11312102221 has 12 divisors (see below), whose sum is σ = 13162182588. Its totient is φ = 9693724992.

The previous prime is 11312102203. The next prime is 11312102231. The reversal of 11312102221 is 12220121311.

It can be written as a sum of positive squares in 2 ways, for example, as 5053077225 + 6259024996 = 71085^2 + 79114^2 .

It is not a de Polignac number, because 11312102221 - 2¹⁷ = 11311971149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11312102195 and 11312102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312102231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192495 + ... + 244291.

It is an arithmetic number, because the mean of its divisors is an integer number (1096848549).

Almost surely, 2^11312102221 is an apocalyptic number.

It is an amenable number.

11312102221 is a deficient number, since it is larger than the sum of its proper divisors (1850080367).

11312102221 is an equidigital number, since it uses as much as digits as its factorization.

11312102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56268 (or 56261 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11312102221 its reverse (12220121311), we get a palindrome (23532223532).

The spelling of 11312102221 in words is "eleven billion, three hundred twelve million, one hundred two thousand, two hundred twenty-one".