111210021992 has 8 divisors (see below), whose sum is σ = 208518791250. Its totient is φ = 55605010992.

The previous prime is 111210021959. The next prime is 111210022037. The reversal of 111210021992 is 299120012111.

It can be written as a sum of positive squares in only one way, i.e., 94277246116 + 16932775876 = 307046^2 + 130126^2 .

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

It is a super-2 number, since 2×111210021992² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6950626367 + ... + 6950626382.

Almost surely, 2^111210021992 is an apocalyptic number.

It is an amenable number.

111210021992 is a deficient number, since it is larger than the sum of its proper divisors (97308769258).

111210021992 is a wasteful number, since it uses less digits than its factorization.

111210021992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13901252755 (or 13901252751 counting only the distinct ones).

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

The spelling of 111210021992 in words is "one hundred eleven billion, two hundred ten million, twenty-one thousand, nine hundred ninety-two".