21233102131 has 4 divisors (see below), whose sum is σ = 21300939832. Its totient is φ = 21165264432.

The previous prime is 21233102083. The next prime is 21233102141. The reversal of 21233102131 is 13120133212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21233102131 - 2¹⁷ = 21232971059 is a prime.

It is a super-2 number, since 2×21233102131² (a number of 21 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 = 21233102099 and 21233102108.

It is not an unprimeable number, because it can be changed into a prime (21233102141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33918381 + ... + 33919006.

It is an arithmetic number, because the mean of its divisors is an integer number (5325234958).

Almost surely, 2^21233102131 is an apocalyptic number.

21233102131 is a deficient number, since it is larger than the sum of its proper divisors (67837701).

21233102131 is an equidigital number, since it uses as much as digits as its factorization.

21233102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67837700.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21233102131 its reverse (13120133212), we get a palindrome (34353235343).

The spelling of 21233102131 in words is "twenty-one billion, two hundred thirty-three million, one hundred two thousand, one hundred thirty-one".