211121001992 has 32 divisors (see below), whose sum is σ = 406259911200. Its totient is φ = 102799597824.

The previous prime is 211121001941. The next prime is 211121001997. The reversal of 211121001992 is 299100121112.

It is not an unprimeable number, because it can be changed into a prime (211121001997) 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 in 7 ways as a sum of consecutive naturals, for example, 794642 + ... + 1026497.

It is an arithmetic number, because the mean of its divisors is an integer number (12695622225).

Almost surely, 2^211121001992 is an apocalyptic number.

It is an amenable number.

211121001992 is a deficient number, since it is larger than the sum of its proper divisors (195138909208).

211121001992 is a wasteful number, since it uses less digits than its factorization.

211121001992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821525 (or 1821521 counting only the distinct ones).

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

The spelling of 211121001992 in words is "two hundred eleven billion, one hundred twenty-one million, one thousand, nine hundred ninety-two".