21101231232331 has 2 divisors, whose sum is σ = 21101231232332. Its totient is φ = 21101231232330.

The previous prime is 21101231232283. The next prime is 21101231232343. The reversal of 21101231232331 is 13323213210112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101231232331 - 2¹⁵ = 21101231199563 is a prime.

It is a super-2 number, since 2×21101231232331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101231232296 and 21101231232305.

It is not a weakly prime, because it can be changed into another prime (21101231236331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550615616165 + 10550615616166.

It is an arithmetic number, because the mean of its divisors is an integer number (10550615616166).

Almost surely, 2^{21101231232331} is an apocalyptic number.

21101231232331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101231232331 is an equidigital number, since it uses as much as digits as its factorization.

21101231232331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21101231232331 its reverse (13323213210112), we get a palindrome (34424444442443).

The spelling of 21101231232331 in words is "twenty-one trillion, one hundred one billion, two hundred thirty-one million, two hundred thirty-two thousand, three hundred thirty-one".