90201222021 has 16 divisors (see below), whose sum is σ = 121120372800. Its totient is φ = 59708409600.

The previous prime is 90201222019. The next prime is 90201222143. The reversal of 90201222021 is 12022210209.

It is a happy number.

It is not a de Polignac number, because 90201222021 - 2¹ = 90201222019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90201222011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216026 + ... + 1288068.

It is an arithmetic number, because the mean of its divisors is an integer number (7570023300).

Almost surely, 2^90201222021 is an apocalyptic number.

It is an amenable number.

90201222021 is a deficient number, since it is larger than the sum of its proper divisors (30919150779).

90201222021 is a wasteful number, since it uses less digits than its factorization.

90201222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74996.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 90201222021 in words is "ninety billion, two hundred one million, two hundred twenty-two thousand, twenty-one".