10101111220 has 48 divisors (see below), whose sum is σ = 22410743040. Its totient is φ = 3818105984.

The previous prime is 10101111217. The next prime is 10101111253. The reversal of 10101111220 is 2211110101.

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 = 10101111197 and 10101111206.

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, 158014 + ... + 212533.

It is an arithmetic number, because the mean of its divisors is an integer number (466890480).

Almost surely, 2^10101111220 is an apocalyptic number.

10101111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10101111220 is an abundant number, since it is smaller than the sum of its proper divisors (12309631820).

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

10101111220 is a wasteful number, since it uses less digits than its factorization.

10101111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370632 (or 370630 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10101111220 its reverse (2211110101), we get a palindrome (12312221321).

The spelling of 10101111220 in words is "ten billion, one hundred one million, one hundred eleven thousand, two hundred twenty".