3160121635661 has 2 divisors, whose sum is σ = 3160121635662. Its totient is φ = 3160121635660.

The previous prime is 3160121635603. The next prime is 3160121635667. The reversal of 3160121635661 is 1665361210613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1581847021225 + 1578274614436 = 1257715^2 + 1256294^2 .

It is a cyclic number.

It is not a de Polignac number, because 3160121635661 - 2²² = 3160117441357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3160121635667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580060817830 + 1580060817831.

It is an arithmetic number, because the mean of its divisors is an integer number (1580060817831).

Almost surely, 2^{3160121635661} is an apocalyptic number.

It is an amenable number.

3160121635661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3160121635661 is an equidigital number, since it uses as much as digits as its factorization.

3160121635661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 3160121635661 in words is "three trillion, one hundred sixty billion, one hundred twenty-one million, six hundred thirty-five thousand, six hundred sixty-one".