1223070979681 has 2 divisors, whose sum is σ = 1223070979682. Its totient is φ = 1223070979680.

The previous prime is 1223070979667. The next prime is 1223070979721. The reversal of 1223070979681 is 1869790703221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1147503718656 + 75567261025 = 1071216^2 + 274895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223070979681 - 2⁵ = 1223070979649 is a prime.

It is a super-2 number, since 2×1223070979681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1223070979601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611535489840 + 611535489841.

It is an arithmetic number, because the mean of its divisors is an integer number (611535489841).

Almost surely, 2^{1223070979681} is an apocalyptic number.

It is an amenable number.

1223070979681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223070979681 is an equidigital number, since it uses as much as digits as its factorization.

1223070979681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 1223070979681 in words is "one trillion, two hundred twenty-three billion, seventy million, nine hundred seventy-nine thousand, six hundred eighty-one".