211001121992 has 8 divisors (see below), whose sum is σ = 395627103750. Its totient is φ = 105500560992.

The previous prime is 211001121983. The next prime is 211001122027. The reversal of 211001121992 is 299121100112.

211001121992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 190188443236 + 20812678756 = 436106^2 + 144266^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13187570117 + ... + 13187570132.

Almost surely, 2^211001121992 is an apocalyptic number.

It is an amenable number.

211001121992 is a deficient number, since it is larger than the sum of its proper divisors (184625981758).

211001121992 is a wasteful number, since it uses less digits than its factorization.

211001121992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26375140255 (or 26375140251 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 211001121992 in words is "two hundred eleven billion, one million, one hundred twenty-one thousand, nine hundred ninety-two".