31321220030131 has 16 divisors (see below), whose sum is σ = 32060546496000. Its totient is φ = 30582392516928.

The previous prime is 31321220030053. The next prime is 31321220030143. The reversal of 31321220030131 is 13103002212313.

It is a cyclic number.

It is not a de Polignac number, because 31321220030131 - 2¹⁹ = 31321219505843 is a prime.

It is a super-2 number, since 2×31321220030131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321220030531) 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, 2747710770 + ... + 2747722168.

It is an arithmetic number, because the mean of its divisors is an integer number (2003784156000).

Almost surely, 2^{31321220030131} is an apocalyptic number.

31321220030131 is a deficient number, since it is larger than the sum of its proper divisors (739326465869).

31321220030131 is a wasteful number, since it uses less digits than its factorization.

31321220030131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27618.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31321220030131 its reverse (13103002212313), we get a palindrome (44424222242444).

The spelling of 31321220030131 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty million, thirty thousand, one hundred thirty-one".