10131031020 has 96 divisors (see below), whose sum is σ = 31143119616. Its totient is φ = 2440339200.

The previous prime is 10131031003. The next prime is 10131031049. The reversal of 10131031020 is 2013013101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10131030987 and 10131031005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54735 + ... + 152505.

It is an arithmetic number, because the mean of its divisors is an integer number (324407496).

Almost surely, 2^10131031020 is an apocalyptic number.

10131031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10131031020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15571559808).

10131031020 is an abundant number, since it is smaller than the sum of its proper divisors (21012088596).

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

10131031020 is a wasteful number, since it uses less digits than its factorization.

10131031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97951 (or 97949 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 10131031020 its reverse (2013013101), we get a palindrome (12144044121).

The spelling of 10131031020 in words is "ten billion, one hundred thirty-one million, thirty-one thousand, twenty".