12222222101 has 2 divisors, whose sum is σ = 12222222102. Its totient is φ = 12222222100.

The previous prime is 12222222091. The next prime is 12222222107. The reversal of 12222222101 is 10122222221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11783319601 + 438902500 = 108551^2 + 20950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12222222101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12222222101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222222107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111111050 + 6111111051.

It is an arithmetic number, because the mean of its divisors is an integer number (6111111051).

Almost surely, 2^12222222101 is an apocalyptic number.

It is an amenable number.

12222222101 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222222101 is an equidigital number, since it uses as much as digits as its factorization.

12222222101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12222222101 its reverse (10122222221), we get a palindrome (22344444322).

The spelling of 12222222101 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred one".