990202310212 has 6 divisors (see below), whose sum is σ = 1732854042878. Its totient is φ = 495101155104.

The previous prime is 990202310101. The next prime is 990202310213. The reversal of 990202310212 is 212013202099.

It can be written as a sum of positive squares in only one way, i.e., 971281207296 + 18921102916 = 985536^2 + 137554^2 .

It is not an unprimeable number, because it can be changed into a prime (990202310213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123775288773 + ... + 123775288780.

Almost surely, 2^990202310212 is an apocalyptic number.

It is an amenable number.

990202310212 is a deficient number, since it is larger than the sum of its proper divisors (742651732666).

990202310212 is a wasteful number, since it uses less digits than its factorization.

990202310212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247550577557 (or 247550577555 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 990202310212 in words is "nine hundred ninety billion, two hundred two million, three hundred ten thousand, two hundred twelve".