31030101020 has 48 divisors (see below), whose sum is σ = 69015911328. Its totient is φ = 11678607360.

The previous prime is 31030101017. The next prime is 31030101077. The reversal of 31030101020 is 2010103013.

It is a super-2 number, since 2×31030101020² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31030100992 and 31030101010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1420904 + ... + 1442576.

It is an arithmetic number, because the mean of its divisors is an integer number (1437831486).

Almost surely, 2^31030101020 is an apocalyptic number.

It is an amenable number.

31030101020 is an abundant number, since it is smaller than the sum of its proper divisors (37985810308).

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

31030101020 is a wasteful number, since it uses less digits than its factorization.

31030101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25910 (or 25908 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 31030101020 its reverse (2010103013), we get a palindrome (33040204033).

The spelling of 31030101020 in words is "thirty-one billion, thirty million, one hundred one thousand, twenty".