122110002011981 has 2 divisors, whose sum is σ = 122110002011982. Its totient is φ = 122110002011980.

The previous prime is 122110002011971. The next prime is 122110002012017. The reversal of 122110002011981 is 189110200011221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65632762974025 + 56477239037956 = 8101405^2 + 7515134^2 .

It is an emirp because it is prime and its reverse (189110200011221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122110002011981 is a prime.

It is a super-2 number, since 2×122110002011981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122110002011951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61055001005990 + 61055001005991.

It is an arithmetic number, because the mean of its divisors is an integer number (61055001005991).

Almost surely, 2^{122110002011981} is an apocalyptic number.

It is an amenable number.

122110002011981 is a deficient number, since it is larger than the sum of its proper divisors (1).

122110002011981 is an equidigital number, since it uses as much as digits as its factorization.

122110002011981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 122110002011981 in words is "one hundred twenty-two trillion, one hundred ten billion, two million, eleven thousand, nine hundred eighty-one".