10120010121 has 48 divisors (see below), whose sum is σ = 16768612224. Its totient is φ = 5826074112.

The previous prime is 10120010101. The next prime is 10120010137. The reversal of 10120010121 is 12101002101.

It is a happy number.

It is not a de Polignac number, because 10120010121 - 2⁶ = 10120010057 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10120010101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 316930 + ... + 347396.

It is an arithmetic number, because the mean of its divisors is an integer number (349346088).

Almost surely, 2^10120010121 is an apocalyptic number.

It is an amenable number.

10120010121 is a deficient number, since it is larger than the sum of its proper divisors (6648602103).

10120010121 is a wasteful number, since it uses less digits than its factorization.

10120010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30670 (or 30667 counting only the distinct ones).

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

Adding to 10120010121 its reverse (12101002101), we get a palindrome (22221012222).

The spelling of 10120010121 in words is "ten billion, one hundred twenty million, ten thousand, one hundred twenty-one".