90021002011 has 4 divisors (see below), whose sum is σ = 90022004800. Its totient is φ = 90019999224.

The previous prime is 90021001979. The next prime is 90021002023. The reversal of 90021002011 is 11020012009.

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 90021002011 - 2⁵ = 90021001979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90021002041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351876 + ... + 551233.

It is an arithmetic number, because the mean of its divisors is an integer number (22505501200).

Almost surely, 2^90021002011 is an apocalyptic number.

90021002011 is a deficient number, since it is larger than the sum of its proper divisors (1002789).

90021002011 is an equidigital number, since it uses as much as digits as its factorization.

90021002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002788.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 90021002011 in words is "ninety billion, twenty-one million, two thousand, eleven".