12201992 has 32 divisors (see below), whose sum is σ = 25094880. Its totient is φ = 5516160.

The previous prime is 12201991. The next prime is 12202007. The reversal of 12201992 is 29910221.

It is a happy number.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12201991) 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, 27323 + ... + 27765.

It is an arithmetic number, because the mean of its divisors is an integer number (784215).

Almost surely, 2^12201992 is an apocalyptic number.

It is an amenable number.

12201992 is an abundant number, since it is smaller than the sum of its proper divisors (12892888).

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

12201992 is a wasteful number, since it uses less digits than its factorization.

12201992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12201992 is about 3493.1349816461. The cubic root of 12201992 is about 230.2202804544.

The spelling of 12201992 in words is "twelve million, two hundred one thousand, nine hundred ninety-two".