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12122102020 = 2257311278413
BaseRepresentation
bin10110100101000100…
…01001100100000100
31011021210212120211111
423102202021210010
5144311224231040
65322510414404
7606253111210
oct132242114404
934253776744
1012122102020
115160679736
122423801404
1311b2546442
1482dd23940
154ae33ddea
hex2d2889904

12122102020 has 48 divisors (see below), whose sum is σ = 29186696448. Its totient is φ = 4142770560.

The previous prime is 12122102017. The next prime is 12122102029. The reversal of 12122102020 is 2020122121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12122102029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95667 + ... + 182746.

It is an arithmetic number, because the mean of its divisors is an integer number (608056176).

Almost surely, 212122102020 is an apocalyptic number.

12122102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122102020 is an abundant number, since it is smaller than the sum of its proper divisors (17064594428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12122102020 is a wasteful number, since it uses less digits than its factorization.

12122102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278740 (or 278738 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12122102020 its reverse (2020122121), we get a palindrome (14142224141).

The spelling of 12122102020 in words is "twelve billion, one hundred twenty-two million, one hundred two thousand, twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 311 622 1244 1555 2177 3110 4354 6220 8708 10885 21770 43540 278413 556826 1113652 1392065 1948891 2784130 3897782 5568260 7795564 9744455 19488910 38977820 86586443 173172886 346345772 432932215 606105101 865864430 1212210202 1731728860 2424420404 3030525505 6061051010 12122102020