222120021181 has 2 divisors, whose sum is σ = 222120021182. Its totient is φ = 222120021180.

The previous prime is 222120021173. The next prime is 222120021311. The reversal of 222120021181 is 181120021222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217583998681 + 4536022500 = 466459^2 + 67350^2 .

It is a cyclic number.

It is not a de Polignac number, because 222120021181 - 2³ = 222120021173 is a prime.

It is a super-2 number, since 2×222120021181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222120081181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060010590 + 111060010591.

It is an arithmetic number, because the mean of its divisors is an integer number (111060010591).

Almost surely, 2^222120021181 is an apocalyptic number.

It is an amenable number.

222120021181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222120021181 is an equidigital number, since it uses as much as digits as its factorization.

222120021181 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 22.

The spelling of 222120021181 in words is "two hundred twenty-two billion, one hundred twenty million, twenty-one thousand, one hundred eighty-one".