12221023311 has 72 divisors (see below), whose sum is σ = 21614436480. Its totient is φ = 6878762352.

The previous prime is 12221023303. The next prime is 12221023327. The reversal of 12221023311 is 11332012221.

12221023311 is a `hidden beast` number, since 122 + 210 + 2 + 331 + 1 = 666.

It is not a de Polignac number, because 12221023311 - 2³ = 12221023303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221023361) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 790110 + ... + 805428.

Almost surely, 2^12221023311 is an apocalyptic number.

12221023311 is a deficient number, since it is larger than the sum of its proper divisors (9393413169).

12221023311 is an equidigital number, since it uses as much as digits as its factorization.

12221023311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15415 (or 15396 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12221023311 its reverse (11332012221), we get a palindrome (23553035532).

The spelling of 12221023311 in words is "twelve billion, two hundred twenty-one million, twenty-three thousand, three hundred eleven".