21031012213211 has 96 divisors (see below), whose sum is σ = 31434760433664. Its totient is φ = 13618347494400.

The previous prime is 21031012213201. The next prime is 21031012213273. The reversal of 21031012213211 is 11231221013012.

It is not a de Polignac number, because 21031012213211 - 2⁶ = 21031012213147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21031012213201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1862846 + ... + 6747756.

It is an arithmetic number, because the mean of its divisors is an integer number (327445421184).

Almost surely, 2^{21031012213211} is an apocalyptic number.

21031012213211 is a deficient number, since it is larger than the sum of its proper divisors (10403748220453).

21031012213211 is a wasteful number, since it uses less digits than its factorization.

21031012213211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884993 (or 4884982 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21031012213211 its reverse (11231221013012), we get a palindrome (32262233226223).

The spelling of 21031012213211 in words is "twenty-one trillion, thirty-one billion, twelve million, two hundred thirteen thousand, two hundred eleven".