111002132020 has 24 divisors (see below), whose sum is σ = 251035591464. Its totient is φ = 40985402496.

The previous prime is 111002131991. The next prime is 111002132027. The reversal of 111002132020 is 20231200111.

It can be written as a sum of positive squares in 4 ways, for example, as 21516195856 + 89485936164 = 146684^2 + 299142^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002132027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213465379 + ... + 213465898.

It is an arithmetic number, because the mean of its divisors is an integer number (10459816311).

Almost surely, 2^111002132020 is an apocalyptic number.

111002132020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111002132020 is an abundant number, since it is smaller than the sum of its proper divisors (140033459444).

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

111002132020 is a wasteful number, since it uses less digits than its factorization.

111002132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426931299 (or 426931297 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 111002132020 its reverse (20231200111), we get a palindrome (131233332131).

The spelling of 111002132020 in words is "one hundred eleven billion, two million, one hundred thirty-two thousand, twenty".