12220291 has 8 divisors (see below), whose sum is σ = 12789504. Its totient is φ = 11654280.

The previous prime is 12220277. The next prime is 12220301. The reversal of 12220291 is 19202221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12220291 - 2⁵ = 12220259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12220261) 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, 10656 + ... + 11746.

It is an arithmetic number, because the mean of its divisors is an integer number (1598688).

Almost surely, 2^12220291 is an apocalyptic number.

12220291 is a deficient number, since it is larger than the sum of its proper divisors (569213).

12220291 is a wasteful number, since it uses less digits than its factorization.

12220291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12220291 is about 3495.7532807680. The cubic root of 12220291 is about 230.3353080314.

The spelling of 12220291 in words is "twelve million, two hundred twenty thousand, two hundred ninety-one".