21232210203131 has 4 divisors (see below), whose sum is σ = 21293047482000. Its totient is φ = 21171372924264.

The previous prime is 21232210203023. The next prime is 21232210203133. The reversal of 21232210203131 is 13130201223212.

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 21232210203131 - 2³⁰ = 21231136461307 is a prime.

It is a super-2 number, since 2×21232210203131² (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 = 21232210203097 and 21232210203106.

It is not an unprimeable number, because it can be changed into a prime (21232210203133) 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, 30418638911 + ... + 30418639608.

It is an arithmetic number, because the mean of its divisors is an integer number (5323261870500).

Almost surely, 2^{21232210203131} is an apocalyptic number.

21232210203131 is a deficient number, since it is larger than the sum of its proper divisors (60837278869).

21232210203131 is an equidigital number, since it uses as much as digits as its factorization.

21232210203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60837278868.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21232210203131 its reverse (13130201223212), we get a palindrome (34362411426343).

The spelling of 21232210203131 in words is "twenty-one trillion, two hundred thirty-two billion, two hundred ten million, two hundred three thousand, one hundred thirty-one".