990000123311 has 6 divisors (see below), whose sum is σ = 1014735404736. Its totient is φ = 965853777200.

The previous prime is 990000123227. The next prime is 990000123347. The reversal of 990000123311 is 113321000099.

990000123311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-990000123311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990000173311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 294465935 + ... + 294469296.

It is an arithmetic number, because the mean of its divisors is an integer number (169122567456).

Almost surely, 2^990000123311 is an apocalyptic number.

990000123311 is a deficient number, since it is larger than the sum of its proper divisors (24735281425).

990000123311 is an equidigital number, since it uses as much as digits as its factorization.

990000123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588935313 (or 588935272 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The spelling of 990000123311 in words is "nine hundred ninety billion, one hundred twenty-three thousand, three hundred eleven".