31101133120 has 28 divisors (see below), whose sum is σ = 74059574004. Its totient is φ = 12440453120.

The previous prime is 31101133057. The next prime is 31101133121. The reversal of 31101133120 is 2133110113.

It can be written as a sum of positive squares in 2 ways, for example, as 22545623104 + 8555510016 = 150152^2 + 92496^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31101133094 and 31101133103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31101133121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48595201 + ... + 48595840.

Almost surely, 2^31101133120 is an apocalyptic number.

It is an amenable number.

31101133120 is an abundant number, since it is smaller than the sum of its proper divisors (42958440884).

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

31101133120 is an equidigital number, since it uses as much as digits as its factorization.

31101133120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97191058 (or 97191048 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31101133120 its reverse (2133110113), we get a palindrome (33234243233).

The spelling of 31101133120 in words is "thirty-one billion, one hundred one million, one hundred thirty-three thousand, one hundred twenty".