212010010121 has 16 divisors (see below), whose sum is σ = 272280417024. Its totient is φ = 160450956864.

The previous prime is 212010010099. The next prime is 212010010127. The reversal of 212010010121 is 121010010212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212010010121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212010010127) 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, 50645306 + ... + 50649491.

It is an arithmetic number, because the mean of its divisors is an integer number (17017526064).

Almost surely, 2^212010010121 is an apocalyptic number.

It is an amenable number.

212010010121 is a deficient number, since it is larger than the sum of its proper divisors (60270406903).

212010010121 is a wasteful number, since it uses less digits than its factorization.

212010010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101294840.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 212010010121 its reverse (121010010212), we get a palindrome (333020020333).

Subtracting from 212010010121 its reverse (121010010212), we obtain a palindrome (90999999909).

The spelling of 212010010121 in words is "two hundred twelve billion, ten million, ten thousand, one hundred twenty-one".