21020211112231 has 32 divisors (see below), whose sum is σ = 22683967488000. Its totient is φ = 19433993040000.

The previous prime is 21020211112223. The next prime is 21020211112247. The reversal of 21020211112231 is 13221111202012.

It is a cyclic number.

It is not a de Polignac number, because 21020211112231 - 2³ = 21020211112223 is a prime.

It is a super-2 number, since 2×21020211112231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020211112199 and 21020211112208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020211512231) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 32056506 + ... + 32705656.

It is an arithmetic number, because the mean of its divisors is an integer number (708873984000).

Almost surely, 2^{21020211112231} is an apocalyptic number.

21020211112231 is a deficient number, since it is larger than the sum of its proper divisors (1663756375769).

21020211112231 is a wasteful number, since it uses less digits than its factorization.

21020211112231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649591.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21020211112231 its reverse (13221111202012), we get a palindrome (34241322314243).

The spelling of 21020211112231 in words is "twenty-one trillion, twenty billion, two hundred eleven million, one hundred twelve thousand, two hundred thirty-one".