21211012302331 has 16 divisors (see below), whose sum is σ = 21932428370688. Its totient is φ = 20491933593600.

The previous prime is 21211012302247. The next prime is 21211012302397. The reversal of 21211012302331 is 13320321011212.

It is a cyclic number.

It is not a de Polignac number, because 21211012302331 - 2¹⁷ = 21211012171259 is a prime.

It is a super-2 number, since 2×21211012302331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211012302031) 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, 100391541 + ... + 100602601.

It is an arithmetic number, because the mean of its divisors is an integer number (1370776773168).

Almost surely, 2^{21211012302331} is an apocalyptic number.

21211012302331 is a deficient number, since it is larger than the sum of its proper divisors (721416068357).

21211012302331 is a wasteful number, since it uses less digits than its factorization.

21211012302331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216582.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21211012302331 its reverse (13320321011212), we get a palindrome (34531333313543).

The spelling of 21211012302331 in words is "twenty-one trillion, two hundred eleven billion, twelve million, three hundred two thousand, three hundred thirty-one".