210021010021011 has 16 divisors (see below), whose sum is σ = 323331314399744. Its totient is φ = 118774768552704.

The previous prime is 210021010020989. The next prime is 210021010021057. The reversal of 210021010021011 is 110120010120012.

It is not a de Polignac number, because 210021010021011 - 2²⁶ = 210020942912147 is a prime.

It is a super-2 number, since 2×210021010021011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210021010121011) 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, 51551546815 + ... + 51551550888.

It is an arithmetic number, because the mean of its divisors is an integer number (20208207149984).

Almost surely, 2^{210021010021011} is an apocalyptic number.

210021010021011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210021010021011 is a deficient number, since it is larger than the sum of its proper divisors (113310304378733).

210021010021011 is a wasteful number, since it uses less digits than its factorization.

210021010021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103103097810.

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

Adding to 210021010021011 its reverse (110120010120012), we get a palindrome (320141020141023).

Subtracting from 210021010021011 its reverse (110120010120012), we obtain a palindrome (99900999900999).

The spelling of 210021010021011 in words is "two hundred ten trillion, twenty-one billion, ten million, twenty-one thousand, eleven".