100111021983 has 40 divisors (see below), whose sum is σ = 179908065920. Its totient is φ = 54195434640.

The previous prime is 100111021981. The next prime is 100111021993. The reversal of 100111021983 is 389120111001.

It is not a de Polignac number, because 100111021983 - 2¹ = 100111021981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111021981) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4635613 + ... + 4657158.

It is an arithmetic number, because the mean of its divisors is an integer number (4497701648).

Almost surely, 2^100111021983 is an apocalyptic number.

100111021983 is a deficient number, since it is larger than the sum of its proper divisors (79797043937).

100111021983 is an equidigital number, since it uses as much as digits as its factorization.

100111021983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9292809 (or 9292800 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

Adding to 100111021983 its reverse (389120111001), we get a palindrome (489231132984).

The spelling of 100111021983 in words is "one hundred billion, one hundred eleven million, twenty-one thousand, nine hundred eighty-three".