100102010121 has 24 divisors (see below), whose sum is σ = 148612241024. Its totient is φ = 64881816480.

The previous prime is 100102010077. The next prime is 100102010201. The reversal of 100102010121 is 121010201001.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-100102010121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100102017121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328626 + ... + 555156.

Almost surely, 2^100102010121 is an apocalyptic number.

It is an amenable number.

100102010121 is a deficient number, since it is larger than the sum of its proper divisors (48510230903).

100102010121 is a wasteful number, since it uses less digits than its factorization.

100102010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227901 (or 227898 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 100102010121 its reverse (121010201001), we get a palindrome (221112211122).

The spelling of 100102010121 in words is "one hundred billion, one hundred two million, ten thousand, one hundred twenty-one".