990111111212211 has 16 divisors (see below), whose sum is σ = 1320257690394624. Its totient is φ = 660019304397024.

The previous prime is 990111111212177. The next prime is 990111111212257. The reversal of 990111111212211 is 112212111111099.

It is not a de Polignac number, because 990111111212211 - 2¹⁴ = 990111111195827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990111111212261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5003317710 + ... + 5003515596.

It is an arithmetic number, because the mean of its divisors is an integer number (82516105649664).

Almost surely, 2^{990111111212211} is an apocalyptic number.

990111111212211 is a deficient number, since it is larger than the sum of its proper divisors (330146579182413).

990111111212211 is a wasteful number, since it uses less digits than its factorization.

990111111212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327850.

The product of its (nonzero) digits is 648, while the sum is 33.

The spelling of 990111111212211 in words is "nine hundred ninety trillion, one hundred eleven billion, one hundred eleven million, two hundred twelve thousand, two hundred eleven".