31204350212420 has 96 divisors (see below), whose sum is σ = 82040498749440. Its totient is φ = 9685336429440.

The previous prime is 31204350212417. The next prime is 31204350212429. The reversal of 31204350212420 is 2421205340213.

It is a super-2 number, since 2×31204350212420² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31204350212429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42022244 + ... + 42758363.

It is an arithmetic number, because the mean of its divisors is an integer number (854588528640).

Almost surely, 2^{31204350212420} is an apocalyptic number.

It is an amenable number.

31204350212420 is an abundant number, since it is smaller than the sum of its proper divisors (50836148537020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31204350212420 is a wasteful number, since it uses less digits than its factorization.

31204350212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84780873 (or 84780871 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 31204350212420 its reverse (2421205340213), we get a palindrome (33625555552633).

The spelling of 31204350212420 in words is "thirty-one trillion, two hundred four billion, three hundred fifty million, two hundred twelve thousand, four hundred twenty".