990213232312 has 8 divisors (see below), whose sum is σ = 1856649810600. Its totient is φ = 495106616152.

The previous prime is 990213232297. The next prime is 990213232357. The reversal of 990213232312 is 213232312099.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61888327012 + ... + 61888327027.

It is an arithmetic number, because the mean of its divisors is an integer number (232081226325).

Almost surely, 2^990213232312 is an apocalyptic number.

It is an amenable number.

990213232312 is a deficient number, since it is larger than the sum of its proper divisors (866436578288).

990213232312 is a wasteful number, since it uses less digits than its factorization.

990213232312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123776654045 (or 123776654041 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

It can be divided in two parts, 99021 and 3232312, that added together give a palindrome (3331333).

The spelling of 990213232312 in words is "nine hundred ninety billion, two hundred thirteen million, two hundred thirty-two thousand, three hundred twelve".