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122021021 = 1912595101
BaseRepresentation
bin1110100010111…
…10010010011101
322111121022101002
413101132102131
5222214133041
620035200045
73011106263
oct721362235
9274538332
10122021021
1162972221
1234a46025
131c383ab5
14122c4433
15aaa459b
hex745e49d

122021021 has 8 divisors (see below), whose sum is σ = 128570400. Its totient is φ = 115484400.

The previous prime is 122020979. The next prime is 122021041. The reversal of 122021021 is 120120221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122021021 - 214 = 122004637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122020993 and 122021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122021041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21371 + ... + 26471.

It is an arithmetic number, because the mean of its divisors is an integer number (16071300).

Almost surely, 2122021021 is an apocalyptic number.

It is an amenable number.

122021021 is a deficient number, since it is larger than the sum of its proper divisors (6549379).

122021021 is a wasteful number, since it uses less digits than its factorization.

122021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6379.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 122021021 is about 11046.3125521597. The cubic root of 122021021 is about 495.9960503609.

Adding to 122021021 its reverse (120120221), we get a palindrome (242141242).

The spelling of 122021021 in words is "one hundred twenty-two million, twenty-one thousand, twenty-one".

Divisors: 1 19 1259 5101 23921 96919 6422159 122021021