222120664139081 has 2 divisors, whose sum is σ = 222120664139082. Its totient is φ = 222120664139080.

The previous prime is 222120664139047. The next prime is 222120664139083. The reversal of 222120664139081 is 180931466021222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221398300132681 + 722364006400 = 14879459^2 + 849920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222120664139081 is a prime.

It is a super-2 number, since 2×222120664139081² (a number of 29 digits) contains 22 as substring.

Together with 222120664139083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222120664139083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060332069540 + 111060332069541.

It is an arithmetic number, because the mean of its divisors is an integer number (111060332069541).

Almost surely, 2^{222120664139081} is an apocalyptic number.

It is an amenable number.

222120664139081 is a deficient number, since it is larger than the sum of its proper divisors (1).

222120664139081 is an equidigital number, since it uses as much as digits as its factorization.

222120664139081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 222120664139081 in words is "two hundred twenty-two trillion, one hundred twenty billion, six hundred sixty-four million, one hundred thirty-nine thousand, eighty-one".