1220332309961 has 2 divisors, whose sum is σ = 1220332309962. Its totient is φ = 1220332309960.

The previous prime is 1220332309939. The next prime is 1220332310039. The reversal of 1220332309961 is 1699032330221.

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., 748302852025 + 472029457936 = 865045^2 + 687044^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220332309961 - 2⁶ = 1220332309897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220332300961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610166154980 + 610166154981.

It is an arithmetic number, because the mean of its divisors is an integer number (610166154981).

Almost surely, 2^{1220332309961} is an apocalyptic number.

It is an amenable number.

1220332309961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220332309961 is an equidigital number, since it uses as much as digits as its factorization.

1220332309961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The spelling of 1220332309961 in words is "one trillion, two hundred twenty billion, three hundred thirty-two million, three hundred nine thousand, nine hundred sixty-one".