10131211220 has 48 divisors (see below), whose sum is σ = 23202197760. Its totient is φ = 3693396096.

The previous prime is 10131211201. The next prime is 10131211249. The reversal of 10131211220 is 2211213101.

It is a junction number, because it is equal to n+sod(n) for n = 10131211195 and 10131211204.

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, 226082 + ... + 267161.

It is an arithmetic number, because the mean of its divisors is an integer number (483379120).

Almost surely, 2^10131211220 is an apocalyptic number.

10131211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10131211220 is an abundant number, since it is smaller than the sum of its proper divisors (13070986540).

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

10131211220 is a wasteful number, since it uses less digits than its factorization.

10131211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493344 (or 493342 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10131211220 its reverse (2211213101), we get a palindrome (12342424321).

The spelling of 10131211220 in words is "ten billion, one hundred thirty-one million, two hundred eleven thousand, two hundred twenty".