31023123202220 has 12 divisors (see below), whose sum is σ = 65148558724704. Its totient is φ = 12409249280880.

The previous prime is 31023123202177. The next prime is 31023123202237. The reversal of 31023123202220 is 2220232132013.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 775578080036 + ... + 775578080075.

It is an arithmetic number, because the mean of its divisors is an integer number (5429046560392).

Almost surely, 2^{31023123202220} is an apocalyptic number.

It is an amenable number.

31023123202220 is an abundant number, since it is smaller than the sum of its proper divisors (34125435522484).

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

31023123202220 is a wasteful number, since it uses less digits than its factorization.

31023123202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551156160120 (or 1551156160118 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31023123202220 its reverse (2220232132013), we get a palindrome (33243355334233).

The spelling of 31023123202220 in words is "thirty-one trillion, twenty-three billion, one hundred twenty-three million, two hundred two thousand, two hundred twenty".