111002101220 has 24 divisors (see below), whose sum is σ = 233685737208. Its totient is φ = 44290112000.

The previous prime is 111002101219. The next prime is 111002101237. The reversal of 111002101220 is 22101200111.

It can be written as a sum of positive squares in 4 ways, for example, as 64797738916 + 46204362304 = 254554^2 + 214952^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6912311 + ... + 6928350.

It is an arithmetic number, because the mean of its divisors is an integer number (9736905717).

Almost surely, 2^111002101220 is an apocalyptic number.

111002101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111002101220 is an abundant number, since it is smaller than the sum of its proper divisors (122683635988).

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

111002101220 is a wasteful number, since it uses less digits than its factorization.

111002101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13841071 (or 13841069 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111002101220 its reverse (22101200111), we get a palindrome (133103301331).

The spelling of 111002101220 in words is "one hundred eleven billion, two million, one hundred one thousand, two hundred twenty".