122212112111861 has 2 divisors, whose sum is σ = 122212112111862. Its totient is φ = 122212112111860.

The previous prime is 122212112111857. The next prime is 122212112112011. The reversal of 122212112111861 is 168111211212221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121461757698961 + 750354412900 = 11020969^2 + 866230^2 .

It is a cyclic number.

It is not a de Polignac number, because 122212112111861 - 2² = 122212112111857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122212112111261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61106056055930 + 61106056055931.

It is an arithmetic number, because the mean of its divisors is an integer number (61106056055931).

Almost surely, 2^{122212112111861} is an apocalyptic number.

It is an amenable number.

122212112111861 is a deficient number, since it is larger than the sum of its proper divisors (1).

122212112111861 is an equidigital number, since it uses as much as digits as its factorization.

122212112111861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 32.

The spelling of 122212112111861 in words is "one hundred twenty-two trillion, two hundred twelve billion, one hundred twelve million, one hundred eleven thousand, eight hundred sixty-one".