12210291 has 8 divisors (see below), whose sum is σ = 18089360. Its totient is φ = 8140176.

The previous prime is 12210287. The next prime is 12210307. The reversal of 12210291 is 19201221.

12210291 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12210291 - 2² = 12210287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210221) 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, 226090 + ... + 226143.

It is an arithmetic number, because the mean of its divisors is an integer number (2261170).

Almost surely, 2^12210291 is an apocalyptic number.

12210291 is a deficient number, since it is larger than the sum of its proper divisors (5879069).

12210291 is an equidigital number, since it uses as much as digits as its factorization.

12210291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452242 (or 452236 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12210291 is about 3494.3226811501. The cubic root of 12210291 is about 230.2724622379.

The spelling of 12210291 in words is "twelve million, two hundred ten thousand, two hundred ninety-one".