12211690 has 16 divisors (see below), whose sum is σ = 22229640. Its totient is φ = 4829440.

The previous prime is 12211687. The next prime is 12211709. The reversal of 12211690 is 9611221.

It can be written as a sum of positive squares in 4 ways, for example, as 6115729 + 6095961 = 2473^2 + 2469^2 .

It is a super-2 number, since 2×12211690² = 298250745312200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5971 + ... + 7750.

Almost surely, 2^12211690 is an apocalyptic number.

12211690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211690 is a deficient number, since it is larger than the sum of its proper divisors (10017950).

12211690 is a wasteful number, since it uses less digits than its factorization.

12211690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13817.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 12211690 is about 3494.5228572725. The cubic root of 12211690 is about 230.2812564283.

The spelling of 12211690 in words is "twelve million, two hundred eleven thousand, six hundred ninety".