990021200202001 has 16 divisors (see below), whose sum is σ = 1170148176445248. Its totient is φ = 827377498483200.

The previous prime is 990021200201977. The next prime is 990021200202007. The reversal of 990021200202001 is 100202002120099.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990021200202001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990021200202007) 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 15 ways as a sum of consecutive naturals, for example, 61560817740 + ... + 61560833821.

It is an arithmetic number, because the mean of its divisors is an integer number (73134261027828).

Almost surely, 2^{990021200202001} is an apocalyptic number.

It is an amenable number.

990021200202001 is a deficient number, since it is larger than the sum of its proper divisors (180126976243247).

990021200202001 is a wasteful number, since it uses less digits than its factorization.

990021200202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123121651632.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 990021200202001 in words is "nine hundred ninety trillion, twenty-one billion, two hundred million, two hundred two thousand, one".