999991220011202 has 4 divisors (see below), whose sum is σ = 1499986830016806. Its totient is φ = 499995610005600.

The previous prime is 999991220011163. The next prime is 999991220011291. The reversal of 999991220011202 is 202110022199999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 986363154403561 + 13628065607641 = 31406419^2 + 3691621^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 249997805002799 + ... + 249997805002802.

Almost surely, 2^{999991220011202} is an apocalyptic number.

999991220011202 is a deficient number, since it is larger than the sum of its proper divisors (499995610005604).

999991220011202 is a wasteful number, since it uses less digits than its factorization.

999991220011202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499995610005603.

The product of its (nonzero) digits is 944784, while the sum is 56.

The spelling of 999991220011202 in words is "nine hundred ninety-nine trillion, nine hundred ninety-one billion, two hundred twenty million, eleven thousand, two hundred two".