201111211992 has 32 divisors (see below), whose sum is σ = 515040911280. Its totient is φ = 65402019840.

The previous prime is 201111211937. The next prime is 201111211993. The reversal of 201111211992 is 299112111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111211993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102189673 + ... + 102191640.

Almost surely, 2^201111211992 is an apocalyptic number.

It is an amenable number.

201111211992 is an abundant number, since it is smaller than the sum of its proper divisors (313929699288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111211992 is a wasteful number, since it uses less digits than its factorization.

201111211992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204381363 (or 204381359 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 201111211992 in words is "two hundred one billion, one hundred eleven million, two hundred eleven thousand, nine hundred ninety-two".