202101011090 has 48 divisors (see below), whose sum is σ = 423380537496. Its totient is φ = 69168253440.

The previous prime is 202101011089. The next prime is 202101011171. The reversal of 202101011090 is 90110101202.

It can be written as a sum of positive squares in 4 ways, for example, as 167831966929 + 34269044161 = 409673^2 + 185119^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4891949 + ... + 4933088.

Almost surely, 2^202101011090 is an apocalyptic number.

202101011090 is an abundant number, since it is smaller than the sum of its proper divisors (221279526406).

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

202101011090 is a wasteful number, since it uses less digits than its factorization.

202101011090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9825083 (or 9825072 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 202101011090 its reverse (90110101202), we get a palindrome (292211112292).

The spelling of 202101011090 in words is "two hundred two billion, one hundred one million, eleven thousand, ninety".