21101231222331 has 64 divisors (see below), whose sum is σ = 31651293542400. Its totient is φ = 12414792208896.

The previous prime is 21101231222251. The next prime is 21101231222359. The reversal of 21101231222331 is 13322213210112.

It is not a de Polignac number, because 21101231222331 - 2¹³ = 21101231214139 is a prime.

It is a super-2 number, since 2×21101231222331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101231232331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 274549150 + ... + 274625996.

It is an arithmetic number, because the mean of its divisors is an integer number (494551461600).

Almost surely, 2^{21101231222331} is an apocalyptic number.

21101231222331 is a deficient number, since it is larger than the sum of its proper divisors (10550062320069).

21101231222331 is a wasteful number, since it uses less digits than its factorization.

21101231222331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79268.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21101231222331 its reverse (13322213210112), we get a palindrome (34423444432443).

The spelling of 21101231222331 in words is "twenty-one trillion, one hundred one billion, two hundred thirty-one million, two hundred twenty-two thousand, three hundred thirty-one".