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12121111102 = 267397227849
BaseRepresentation
bin10110100100111100…
…10111101000111110
31011021202000020112211
423102132113220332
5144311001023402
65322433251034
7606241513222
oct132236275076
934252006484
1012121111102
1151600621a1
122423403a7a
1311b228a3b9
1482db46782
154ae1e54d7
hex2d2797a3e

12121111102 has 16 divisors (see below), whose sum is σ = 18499597200. Its totient is φ = 5955035328.

The previous prime is 12121111097. The next prime is 12121111117. The reversal of 12121111102 is 20111112121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60727 + ... + 167122.

It is an arithmetic number, because the mean of its divisors is an integer number (1156224825).

Almost surely, 212121111102 is an apocalyptic number.

12121111102 is a deficient number, since it is larger than the sum of its proper divisors (6378486098).

12121111102 is a wasteful number, since it uses less digits than its factorization.

12121111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228315.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12121111102 its reverse (20111112121), we get a palindrome (32232223223).

The spelling of 12121111102 in words is "twelve billion, one hundred twenty-one million, one hundred eleven thousand, one hundred two".

Divisors: 1 2 67 134 397 794 26599 53198 227849 455698 15265883 30531766 90456053 180912106 6060555551 12121111102