12220955 has 4 divisors (see below), whose sum is σ = 14665152. Its totient is φ = 9776760.

The previous prime is 12220951. The next prime is 12220969. The reversal of 12220955 is 55902221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12220955 - 2² = 12220951 is a prime.

It is a super-2 number, since 2×12220955² = 298703482224050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222091 + ... + 1222100.

It is an arithmetic number, because the mean of its divisors is an integer number (3666288).

Almost surely, 2^12220955 is an apocalyptic number.

12220955 is a deficient number, since it is larger than the sum of its proper divisors (2444197).

12220955 is an equidigital number, since it uses as much as digits as its factorization.

12220955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444196.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12220955 is about 3495.8482518553. The cubic root of 12220955 is about 230.3394797781.

The spelling of 12220955 in words is "twelve million, two hundred twenty thousand, nine hundred fifty-five".