100027391821 has 4 divisors (see below), whose sum is σ = 114317019232. Its totient is φ = 85737764412.

The previous prime is 100027391801. The next prime is 100027391833. The reversal of 100027391821 is 128193720001.

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 not a de Polignac number, because 100027391821 - 2⁹ = 100027391309 is a prime.

It is a super-2 number, since 2×100027391821² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100027391801) 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, 7144813695 + ... + 7144813708.

It is an arithmetic number, because the mean of its divisors is an integer number (28579254808).

Almost surely, 2^100027391821 is an apocalyptic number.

It is an amenable number.

100027391821 is a deficient number, since it is larger than the sum of its proper divisors (14289627411).

100027391821 is an equidigital number, since it uses as much as digits as its factorization.

100027391821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14289627410.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 100027391821 in words is "one hundred billion, twenty-seven million, three hundred ninety-one thousand, eight hundred twenty-one".