10211210121 has 16 divisors (see below), whose sum is σ = 15561801728. Its totient is φ = 5834278800.

The previous prime is 10211210117. The next prime is 10211210183. The reversal of 10211210121 is 12101211201.

It is not a de Polignac number, because 10211210121 - 2² = 10211210117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211210097 and 10211210106.

It is not an unprimeable number, because it can be changed into a prime (10211210101) 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, 188286 + ... + 236376.

It is an arithmetic number, because the mean of its divisors is an integer number (972612608).

Almost surely, 2^10211210121 is an apocalyptic number.

It is an amenable number.

10211210121 is a deficient number, since it is larger than the sum of its proper divisors (5350591607).

10211210121 is a wasteful number, since it uses less digits than its factorization.

10211210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58212.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10211210121 its reverse (12101211201), we get a palindrome (22312421322).

The spelling of 10211210121 in words is "ten billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-one".