31030121140 has 24 divisors (see below), whose sum is σ = 65166566472. Its totient is φ = 12411417600.

The previous prime is 31030121113. The next prime is 31030121173. The reversal of 31030121140 is 4112103013.

It can be written as a sum of positive squares in 4 ways, for example, as 12270435984 + 18759685156 = 110772^2 + 136966^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732540 + ... + 773740.

It is an arithmetic number, because the mean of its divisors is an integer number (2715273603).

Almost surely, 2^31030121140 is an apocalyptic number.

It is an amenable number.

31030121140 is an abundant number, since it is smaller than the sum of its proper divisors (34136445332).

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

31030121140 is a wasteful number, since it uses less digits than its factorization.

31030121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78867 (or 78865 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31030121140 its reverse (4112103013), we get a palindrome (35142224153).

The spelling of 31030121140 in words is "thirty-one billion, thirty million, one hundred twenty-one thousand, one hundred forty".