31242122031 has 16 divisors (see below), whose sum is σ = 42136174080. Its totient is φ = 20588208960.

The previous prime is 31242122027. The next prime is 31242122063. The reversal of 31242122031 is 13022124213.

It is not a de Polignac number, because 31242122031 - 2² = 31242122027 is a prime.

It is a super-2 number, since 2×31242122031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31242121989 and 31242122007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242142031) 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, 1054186 + ... + 1083416.

It is an arithmetic number, because the mean of its divisors is an integer number (2633510880).

Almost surely, 2^31242122031 is an apocalyptic number.

31242122031 is a deficient number, since it is larger than the sum of its proper divisors (10894052049).

31242122031 is a wasteful number, since it uses less digits than its factorization.

31242122031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33326.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31242122031 its reverse (13022124213), we get a palindrome (44264246244).

The spelling of 31242122031 in words is "thirty-one billion, two hundred forty-two million, one hundred twenty-two thousand, thirty-one".