210021012122011 has 4 divisors (see below), whose sum is σ = 210021117792192. Its totient is φ = 210020906451832.

The previous prime is 210021012121937. The next prime is 210021012122063. The reversal of 210021012122011 is 110221210120012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210021012122011 - 2³⁵ = 209986652383643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021012125011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49795531 + ... + 53848276.

It is an arithmetic number, because the mean of its divisors is an integer number (52505279448048).

Almost surely, 2^{210021012122011} is an apocalyptic number.

210021012122011 is a deficient number, since it is larger than the sum of its proper divisors (105670181).

210021012122011 is a wasteful number, since it uses less digits than its factorization.

210021012122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105670180.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210021012122011 its reverse (110221210120012), we get a palindrome (320242222242023).

The spelling of 210021012122011 in words is "two hundred ten trillion, twenty-one billion, twelve million, one hundred twenty-two thousand, eleven".