1220112961 has 2 divisors, whose sum is σ = 1220112962. Its totient is φ = 1220112960.

The previous prime is 1220112953. The next prime is 1220112983. The reversal of 1220112961 is 1692110221.

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., 1069290000 + 150822961 = 32700^2 + 12281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220112961 - 2³ = 1220112953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220112941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610056480 + 610056481.

It is an arithmetic number, because the mean of its divisors is an integer number (610056481).

Almost surely, 2^1220112961 is an apocalyptic number.

It is an amenable number.

1220112961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220112961 is an equidigital number, since it uses as much as digits as its factorization.

1220112961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1220112961 is about 34930.1153877281. The cubic root of 1220112961 is about 1068.5627078707.

The spelling of 1220112961 in words is "one billion, two hundred twenty million, one hundred twelve thousand, nine hundred sixty-one".