12222311021 has 16 divisors (see below), whose sum is σ = 12820122624. Its totient is φ = 11630196864.

The previous prime is 12222310981. The next prime is 12222311033. The reversal of 12222311021 is 12011322221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12222311021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222314021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4368395 + ... + 4371191.

It is an arithmetic number, because the mean of its divisors is an integer number (801257664).

Almost surely, 2^12222311021 is an apocalyptic number.

It is an amenable number.

12222311021 is a deficient number, since it is larger than the sum of its proper divisors (597811603).

12222311021 is a wasteful number, since it uses less digits than its factorization.

12222311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740.

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

Adding to 12222311021 its reverse (12011322221), we get a palindrome (24233633242).

The spelling of 12222311021 in words is "twelve billion, two hundred twenty-two million, three hundred eleven thousand, twenty-one".