990200122111001 has 4 divisors (see below), whose sum is σ = 1042315918011600. Its totient is φ = 938084326210404.

The previous prime is 990200122110949. The next prime is 990200122111003. The reversal of 990200122111001 is 100111221002099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990200122111001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990200122111003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26057897950271 + ... + 26057897950308.

It is an arithmetic number, because the mean of its divisors is an integer number (260578979502900).

Almost surely, 2^{990200122111001} is an apocalyptic number.

It is an amenable number.

990200122111001 is a deficient number, since it is larger than the sum of its proper divisors (52115795900599).

990200122111001 is a wasteful number, since it uses less digits than its factorization.

990200122111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52115795900598.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 990200122111001 in words is "nine hundred ninety trillion, two hundred billion, one hundred twenty-two million, one hundred eleven thousand, one".