10010111220 has 60 divisors (see below), whose sum is σ = 31402094724. Its totient is φ = 2669362560.

The previous prime is 10010111213. The next prime is 10010111227. The reversal of 10010111220 is 2211101001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10010111213) and next prime (10010111227).

It can be written as a sum of positive squares in 2 ways, for example, as 2563801956 + 7446309264 = 50634^2 + 86292^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010111227) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3087921 + ... + 3091160.

Almost surely, 2^10010111220 is an apocalyptic number.

10010111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10010111220 is an abundant number, since it is smaller than the sum of its proper divisors (21391983504).

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

10010111220 is a wasteful number, since it uses less digits than its factorization.

10010111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6179102 (or 6179091 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10010111220 its reverse (2211101001), we get a palindrome (12221212221).

The spelling of 10010111220 in words is "ten billion, ten million, one hundred eleven thousand, two hundred twenty".