222001111020181 has 2 divisors, whose sum is σ = 222001111020182. Its totient is φ = 222001111020180.

The previous prime is 222001111020167. The next prime is 222001111020211. The reversal of 222001111020181 is 181020111100222.

It is a happy number.

222001111020181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221954396681956 + 46714338225 = 14898134^2 + 216135^2 .

It is a cyclic number.

It is not a de Polignac number, because 222001111020181 - 2²¹ = 222001108923029 is a prime.

It is a super-2 number, since 2×222001111020181² (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 (222001111021181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111000555510090 + 111000555510091.

It is an arithmetic number, because the mean of its divisors is an integer number (111000555510091).

Almost surely, 2^{222001111020181} is an apocalyptic number.

It is an amenable number.

222001111020181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222001111020181 is an equidigital number, since it uses as much as digits as its factorization.

222001111020181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 222001111020181 in words is "two hundred twenty-two trillion, one billion, one hundred eleven million, twenty thousand, one hundred eighty-one".