100652021491 has 4 divisors (see below), whose sum is σ = 115030881712. Its totient is φ = 86273161272.

The previous prime is 100652021443. The next prime is 100652021497. The reversal of 100652021491 is 194120256001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100652021491 - 2⁹ = 100652020979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100652021497) 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, 7189430100 + ... + 7189430113.

It is an arithmetic number, because the mean of its divisors is an integer number (28757720428).

Almost surely, 2^100652021491 is an apocalyptic number.

100652021491 is a deficient number, since it is larger than the sum of its proper divisors (14378860221).

100652021491 is an equidigital number, since it uses as much as digits as its factorization.

100652021491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14378860220.

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 100652021491 its reverse (194120256001), we get a palindrome (294772277492).

The spelling of 100652021491 in words is "one hundred billion, six hundred fifty-two million, twenty-one thousand, four hundred ninety-one".