990385806122 has 4 divisors (see below), whose sum is σ = 1485578709186. Its totient is φ = 495192903060.

The previous prime is 990385806103. The next prime is 990385806169. The reversal of 990385806122 is 221608583099.

990385806122 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 only one way, i.e., 926558331241 + 63827474881 = 962579^2 + 252641^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247596451529 + ... + 247596451532.

Almost surely, 2^990385806122 is an apocalyptic number.

990385806122 is a deficient number, since it is larger than the sum of its proper divisors (495192903064).

990385806122 is a wasteful number, since it uses less digits than its factorization.

990385806122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495192903063.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 990385806122 in words is "nine hundred ninety billion, three hundred eighty-five million, eight hundred six thousand, one hundred twenty-two".