222766130077721 has 2 divisors, whose sum is σ = 222766130077722. Its totient is φ = 222766130077720.

The previous prime is 222766130077709. The next prime is 222766130077747. The reversal of 222766130077721 is 127770031667222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220611282234121 + 2154847843600 = 14852989^2 + 1467940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222766130077721 is a prime.

It is a super-2 number, since 2×222766130077721² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (222766130037721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111383065038860 + 111383065038861.

It is an arithmetic number, because the mean of its divisors is an integer number (111383065038861).

Almost surely, 2^{222766130077721} is an apocalyptic number.

It is an amenable number.

222766130077721 is a deficient number, since it is larger than the sum of its proper divisors (1).

222766130077721 is an equidigital number, since it uses as much as digits as its factorization.

222766130077721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4148928, while the sum is 53.

The spelling of 222766130077721 in words is "two hundred twenty-two trillion, seven hundred sixty-six billion, one hundred thirty million, seventy-seven thousand, seven hundred twenty-one".