31221241044 has 48 divisors (see below), whose sum is σ = 85287302016. Its totient is φ = 8702784000.

The previous prime is 31221240997. The next prime is 31221241063. The reversal of 31221241044 is 44014212213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4529257 + ... + 4536144.

It is an arithmetic number, because the mean of its divisors is an integer number (1776818792).

Almost surely, 2^31221241044 is an apocalyptic number.

It is an amenable number.

31221241044 is an abundant number, since it is smaller than the sum of its proper divisors (54066060972).

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

31221241044 is a wasteful number, since it uses less digits than its factorization.

31221241044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9065456 (or 9065454 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 31221241044 its reverse (44014212213), we get a palindrome (75235453257).

The spelling of 31221241044 in words is "thirty-one billion, two hundred twenty-one million, two hundred forty-one thousand, forty-four".