90201222020 has 48 divisors (see below), whose sum is σ = 233135470848. Its totient is φ = 28547199360.

The previous prime is 90201222019. The next prime is 90201222143. The reversal of 90201222020 is 2022210209.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 90201221983 and 90201222001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24778736 + ... + 24782375.

It is an arithmetic number, because the mean of its divisors is an integer number (4856988976).

Almost surely, 2^90201222020 is an apocalyptic number.

It is an amenable number.

90201222020 is an abundant number, since it is smaller than the sum of its proper divisors (142934248828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90201222020 is a wasteful number, since it uses less digits than its factorization.

90201222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49561140 (or 49561138 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 90201222020 its reverse (2022210209), we get a palindrome (92223432229).

The spelling of 90201222020 in words is "ninety billion, two hundred one million, two hundred twenty-two thousand, twenty".