12201988 has 12 divisors (see below), whose sum is σ = 22609692. Its totient is φ = 5742080.

The previous prime is 12201961. The next prime is 12201991. The reversal of 12201988 is 88910221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3392964 + 8809024 = 1842^2 + 2968^2 .

It is a super-2 number, since 2×12201988² = 297777022304288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89653 + ... + 89788.

It is an arithmetic number, because the mean of its divisors is an integer number (1884141).

Almost surely, 2^12201988 is an apocalyptic number.

It is an amenable number.

12201988 is a deficient number, since it is larger than the sum of its proper divisors (10407704).

12201988 is a wasteful number, since it uses less digits than its factorization.

12201988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179462 (or 179460 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 12201988 is about 3493.1344090945. The cubic root of 12201988 is about 230.2202552978.

The spelling of 12201988 in words is "twelve million, two hundred one thousand, nine hundred eighty-eight".