10100012121 has 8 divisors (see below), whose sum is σ = 14962980960. Its totient is φ = 6733341396.

The previous prime is 10100012113. The next prime is 10100012147. The reversal of 10100012121 is 12121000101.

It is a happy number.

It is not a de Polignac number, because 10100012121 - 2³ = 10100012113 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (10100012101) 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, 187037235 + ... + 187037288.

It is an arithmetic number, because the mean of its divisors is an integer number (1870372620).

Almost surely, 2^10100012121 is an apocalyptic number.

It is an amenable number.

10100012121 is a deficient number, since it is larger than the sum of its proper divisors (4862968839).

10100012121 is an equidigital number, since it uses as much as digits as its factorization.

10100012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374074532 (or 374074526 counting only the distinct ones).

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

Adding to 10100012121 its reverse (12121000101), we get a palindrome (22221012222).

The spelling of 10100012121 in words is "ten billion, one hundred million, twelve thousand, one hundred twenty-one".