122220111020081 has 2 divisors, whose sum is σ = 122220111020082. Its totient is φ = 122220111020080.

The previous prime is 122220111020041. The next prime is 122220111020149. The reversal of 122220111020081 is 180020111022221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71352062410225 + 50868048609856 = 8447015^2 + 7132184^2 .

It is a cyclic number.

It is not a de Polignac number, because 122220111020081 - 2³⁰ = 122219037278257 is a prime.

It is a super-2 number, since 2×122220111020081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122220111020041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110055510040 + 61110055510041.

It is an arithmetic number, because the mean of its divisors is an integer number (61110055510041).

Almost surely, 2^{122220111020081} is an apocalyptic number.

It is an amenable number.

122220111020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

122220111020081 is an equidigital number, since it uses as much as digits as its factorization.

122220111020081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 23.

The spelling of 122220111020081 in words is "one hundred twenty-two trillion, two hundred twenty billion, one hundred eleven million, twenty thousand, eighty-one".