10111213220 has 12 divisors (see below), whose sum is σ = 21233547804. Its totient is φ = 4044485280.

The previous prime is 10111213183. The next prime is 10111213253. The reversal of 10111213220 is 2231211101.

It can be written as a sum of positive squares in 2 ways, for example, as 7392216484 + 2718996736 = 85978^2 + 52144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10111213195 and 10111213204.

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, 252780311 + ... + 252780350.

It is an arithmetic number, because the mean of its divisors is an integer number (1769462317).

Almost surely, 2^10111213220 is an apocalyptic number.

10111213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111213220 is an abundant number, since it is smaller than the sum of its proper divisors (11122334584).

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

10111213220 is a wasteful number, since it uses less digits than its factorization.

10111213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505560670 (or 505560668 counting only the distinct ones).

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

Adding to 10111213220 its reverse (2231211101), we get a palindrome (12342424321).

The spelling of 10111213220 in words is "ten billion, one hundred eleven million, two hundred thirteen thousand, two hundred twenty".