100502440021 has 4 divisors (see below), whose sum is σ = 102839706112. Its totient is φ = 98165173932.

The previous prime is 100502440001. The next prime is 100502440039. The reversal of 100502440021 is 120044205001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100502440021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100502440001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1168632981 + ... + 1168633066.

It is an arithmetic number, because the mean of its divisors is an integer number (25709926528).

Almost surely, 2^100502440021 is an apocalyptic number.

It is an amenable number.

100502440021 is a deficient number, since it is larger than the sum of its proper divisors (2337266091).

100502440021 is an equidigital number, since it uses as much as digits as its factorization.

100502440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337266090.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 100502440021 its reverse (120044205001), we get a palindrome (220546645022).

The spelling of 100502440021 in words is "one hundred billion, five hundred two million, four hundred forty thousand, twenty-one".