100605286021 has 4 divisors (see below), whose sum is σ = 100867963392. Its totient is φ = 100342608652.

The previous prime is 100605286003. The next prime is 100605286031. The reversal of 100605286021 is 120682506001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120682506001 = 43 ⋅2806569907.

It is a cyclic number.

It is not a de Polignac number, because 100605286021 - 2⁹ = 100605285509 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 (100605286031) 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 3 ways as a sum of consecutive naturals, for example, 131338111 + ... + 131338876.

It is an arithmetic number, because the mean of its divisors is an integer number (25216990848).

Almost surely, 2^100605286021 is an apocalyptic number.

It is an amenable number.

100605286021 is a deficient number, since it is larger than the sum of its proper divisors (262677371).

100605286021 is an equidigital number, since it uses as much as digits as its factorization.

100605286021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262677370.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 100605286021 in words is "one hundred billion, six hundred five million, two hundred eighty-six thousand, twenty-one".