31261203226421 has 12 divisors (see below), whose sum is σ = 37001539684512. Its totient is φ = 25871340596304.

The previous prime is 31261203226391. The next prime is 31261203226441. The reversal of 31261203226421 is 12462230216213.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-31261203226421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31261203226441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2655098855 + ... + 2655110628.

It is an arithmetic number, because the mean of its divisors is an integer number (3083461640376).

Almost surely, 2^{31261203226421} is an apocalyptic number.

It is an amenable number.

31261203226421 is a deficient number, since it is larger than the sum of its proper divisors (5740336458091).

31261203226421 is an equidigital number, since it uses as much as digits as its factorization.

31261203226421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5310209548 (or 5310209519 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 31261203226421 in words is "thirty-one trillion, two hundred sixty-one billion, two hundred three million, two hundred twenty-six thousand, four hundred twenty-one".