990211120201 has 4 divisors (see below), whose sum is σ = 1048458833172. Its totient is φ = 931963407232.

The previous prime is 990211120091. The next prime is 990211120237. The reversal of 990211120201 is 102021112099.

990211120201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 618173337600 + 372037782601 = 786240^2 + 609949^2 .

It is a de Polignac number, because none of the positive numbers 2^k-990211120201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 990211120201.

It is not an unprimeable number, because it can be changed into a prime (990211120271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29123856460 + ... + 29123856493.

It is an arithmetic number, because the mean of its divisors is an integer number (262114708293).

Almost surely, 2^990211120201 is an apocalyptic number.

It is an amenable number.

990211120201 is a deficient number, since it is larger than the sum of its proper divisors (58247712971).

990211120201 is a wasteful number, since it uses less digits than its factorization.

990211120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58247712970.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 990211120201 in words is "nine hundred ninety billion, two hundred eleven million, one hundred twenty thousand, two hundred one".