21021000011210 has 32 divisors (see below), whose sum is σ = 38194142025600. Its totient is φ = 8329224076992.

The previous prime is 21021000011183. The next prime is 21021000011251. The reversal of 21021000011210 is 1211000012012.

It is a junction number, because it is equal to n+sod(n) for n = 21021000011191 and 21021000011200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14498891 + ... + 15882689.

It is an arithmetic number, because the mean of its divisors is an integer number (1193566938300).

Almost surely, 2^{21021000011210} is an apocalyptic number.

21021000011210 is a deficient number, since it is larger than the sum of its proper divisors (17173142014390).

21021000011210 is a wasteful number, since it uses less digits than its factorization.

21021000011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398110.

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

Adding to 21021000011210 its reverse (1211000012012), we get a palindrome (22232000023222).

The spelling of 21021000011210 in words is "twenty-one trillion, twenty-one billion, eleven thousand, two hundred ten".