31010102020 has 12 divisors (see below), whose sum is σ = 65121214284. Its totient is φ = 12404040800.

The previous prime is 31010102017. The next prime is 31010102047. The reversal of 31010102020 is 2020101013.

It can be written as a sum of positive squares in 2 ways, for example, as 12631961664 + 18378140356 = 112392^2 + 135566^2 .

It is a super-3 number, since 3×31010102020³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 31010101988 and 31010102006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775252531 + ... + 775252570.

It is an arithmetic number, because the mean of its divisors is an integer number (5426767857).

Almost surely, 2^31010102020 is an apocalyptic number.

It is an amenable number.

31010102020 is an abundant number, since it is smaller than the sum of its proper divisors (34111112264).

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

31010102020 is a wasteful number, since it uses less digits than its factorization.

31010102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550505110 (or 1550505108 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 31010102020 its reverse (2020101013), we get a palindrome (33030203033).

The spelling of 31010102020 in words is "thirty-one billion, ten million, one hundred two thousand, twenty".