2122102219981 has 2 divisors, whose sum is σ = 2122102219982. Its totient is φ = 2122102219980.

The previous prime is 2122102219927. The next prime is 2122102220039. The reversal of 2122102219981 is 1899122012212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2098427474025 + 23674745956 = 1448595^2 + 153866^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122102219981 - 2²¹ = 2122100122829 is a prime.

It is a super-2 number, since 2×2122102219981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122102289981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061051109990 + 1061051109991.

It is an arithmetic number, because the mean of its divisors is an integer number (1061051109991).

Almost surely, 2^{2122102219981} is an apocalyptic number.

It is an amenable number.

2122102219981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122102219981 is an equidigital number, since it uses as much as digits as its factorization.

2122102219981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 2122102219981 in words is "two trillion, one hundred twenty-two billion, one hundred two million, two hundred nineteen thousand, nine hundred eighty-one".