31020323121100 has 18 divisors (see below), whose sum is σ = 67314101173004. Its totient is φ = 12408129248400.

The previous prime is 31020323121071. The next prime is 31020323121103. The reversal of 31020323121100 is 112132302013.

It is not an unprimeable number, because it can be changed into a prime (31020323121103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155101615506 + ... + 155101615705.

Almost surely, 2^{31020323121100} is an apocalyptic number.

It is an amenable number.

31020323121100 is an abundant number, since it is smaller than the sum of its proper divisors (36293778051904).

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

31020323121100 is a wasteful number, since it uses less digits than its factorization.

31020323121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310203231225 (or 310203231218 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31020323121100 its reverse (112132302013), we get a palindrome (31132455423113).

The spelling of 31020323121100 in words is "thirty-one trillion, twenty billion, three hundred twenty-three million, one hundred twenty-one thousand, one hundred".