11212291 has 2 divisors, whose sum is σ = 11212292. Its totient is φ = 11212290.

The previous prime is 11212283. The next prime is 11212319. The reversal of 11212291 is 19221211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11212291 - 2³ = 11212283 is a prime.

It is not a weakly prime, because it can be changed into another prime (11222291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606145 + 5606146.

It is an arithmetic number, because the mean of its divisors is an integer number (5606146).

Almost surely, 2^11212291 is an apocalyptic number.

11212291 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212291 is an equidigital number, since it uses as much as digits as its factorization.

11212291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 19.

The square root of 11212291 is about 3348.4759219681. The cubic root of 11212291 is about 223.8196025777.

It can be divided in two parts, 112 and 12291, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 11212291 in words is "eleven million, two hundred twelve thousand, two hundred ninety-one".