11312202221 has 2 divisors, whose sum is σ = 11312202222. Its totient is φ = 11312202220.

The previous prime is 11312202149. The next prime is 11312202229. The reversal of 11312202221 is 12220221311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10292102500 + 1020099721 = 101450^2 + 31939^2 .

It is a cyclic number.

It is not a de Polignac number, because 11312202221 - 2¹⁴ = 11312185837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11312202221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11312202229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656101110 + 5656101111.

It is an arithmetic number, because the mean of its divisors is an integer number (5656101111).

Almost surely, 2^11312202221 is an apocalyptic number.

It is an amenable number.

11312202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312202221 is an equidigital number, since it uses as much as digits as its factorization.

11312202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 11312202221 its reverse (12220221311), we get a palindrome (23532423532).

The spelling of 11312202221 in words is "eleven billion, three hundred twelve million, two hundred two thousand, two hundred twenty-one".