21230011331231 has 24 divisors (see below), whose sum is σ = 22117644126720. Its totient is φ = 20376051474240.

The previous prime is 21230011331219. The next prime is 21230011331281. The reversal of 21230011331231 is 13213311003212.

It is a de Polignac number, because none of the positive numbers 2^k-21230011331231 is a prime.

It is a super-2 number, since 2×21230011331231² (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 = 21230011331197 and 21230011331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230011331281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355004825 + ... + 355064621.

It is an arithmetic number, because the mean of its divisors is an integer number (921568505280).

Almost surely, 2^{21230011331231} is an apocalyptic number.

21230011331231 is a deficient number, since it is larger than the sum of its proper divisors (887632795489).

21230011331231 is a wasteful number, since it uses less digits than its factorization.

21230011331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62895 (or 62864 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21230011331231 its reverse (13213311003212), we get a palindrome (34443322334443).

The spelling of 21230011331231 in words is "twenty-one trillion, two hundred thirty billion, eleven million, three hundred thirty-one thousand, two hundred thirty-one".