10020012121 has 16 divisors (see below), whose sum is σ = 12128128000. Its totient is φ = 8086616208.

The previous prime is 10020012089. The next prime is 10020012127. The reversal of 10020012121 is 12121002001.

It is a cyclic number.

It is not a de Polignac number, because 10020012121 - 2⁵ = 10020012089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10020012098 and 10020012107.

It is not an unprimeable number, because it can be changed into a prime (10020012127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209421 + ... + 252778.

It is an arithmetic number, because the mean of its divisors is an integer number (758008000).

Almost surely, 2^10020012121 is an apocalyptic number.

It is an amenable number.

10020012121 is a deficient number, since it is larger than the sum of its proper divisors (2108115879).

10020012121 is a wasteful number, since it uses less digits than its factorization.

10020012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462388.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10020012121 its reverse (12121002001), we get a palindrome (22141014122).

The spelling of 10020012121 in words is "ten billion, twenty million, twelve thousand, one hundred twenty-one".