31021332123 has 16 divisors (see below), whose sum is σ = 42957986816. Its totient is φ = 19890969120.

The previous prime is 31021332073. The next prime is 31021332143. The reversal of 31021332123 is 32123312013.

It is not a de Polignac number, because 31021332123 - 2⁹ = 31021331611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31021332123.

It is not an unprimeable number, because it can be changed into a prime (31021332143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1008040 + ... + 1038357.

It is an arithmetic number, because the mean of its divisors is an integer number (2684874176).

Almost surely, 2^31021332123 is an apocalyptic number.

31021332123 is a deficient number, since it is larger than the sum of its proper divisors (11936654693).

31021332123 is a wasteful number, since it uses less digits than its factorization.

31021332123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046594.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31021332123 its reverse (32123312013), we get a palindrome (63144644136).

The spelling of 31021332123 in words is "thirty-one billion, twenty-one million, three hundred thirty-two thousand, one hundred twenty-three".