12122210981 has 2 divisors, whose sum is σ = 12122210982. Its totient is φ = 12122210980.

The previous prime is 12122210963. The next prime is 12122211037. The reversal of 12122210981 is 18901222121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11385957025 + 736253956 = 106705^2 + 27134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12122210981 is a prime.

It is a super-2 number, since 2×12122210981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122215981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061105490 + 6061105491.

It is an arithmetic number, because the mean of its divisors is an integer number (6061105491).

Almost surely, 2^12122210981 is an apocalyptic number.

It is an amenable number.

12122210981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122210981 is an equidigital number, since it uses as much as digits as its factorization.

12122210981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 12122210981 in words is "twelve billion, one hundred twenty-two million, two hundred ten thousand, nine hundred eighty-one".