1222212101081 has 2 divisors, whose sum is σ = 1222212101082. Its totient is φ = 1222212101080.

The previous prime is 1222212101069. The next prime is 1222212101161. The reversal of 1222212101081 is 1801012122221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 830722873600 + 391489227481 = 911440^2 + 625691^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222212101081 - 2³⁰ = 1221138359257 is a prime.

It is a super-2 number, since 2×1222212101081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1222212101051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611106050540 + 611106050541.

It is an arithmetic number, because the mean of its divisors is an integer number (611106050541).

Almost surely, 2^{1222212101081} is an apocalyptic number.

It is an amenable number.

1222212101081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212101081 is an equidigital number, since it uses as much as digits as its factorization.

1222212101081 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 1222212101081 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred one thousand, eighty-one".