3213213309961 has 2 divisors, whose sum is σ = 3213213309962. Its totient is φ = 3213213309960.

The previous prime is 3213213309953. The next prime is 3213213310081. The reversal of 3213213309961 is 1699033123123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1799504199936 + 1413709110025 = 1341456^2 + 1188995^2 .

It is a cyclic number.

It is not a de Polignac number, because 3213213309961 - 2³ = 3213213309953 is a prime.

It is not a weakly prime, because it can be changed into another prime (3213213409961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606606654980 + 1606606654981.

It is an arithmetic number, because the mean of its divisors is an integer number (1606606654981).

Almost surely, 2^{3213213309961} is an apocalyptic number.

It is an amenable number.

3213213309961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3213213309961 is an equidigital number, since it uses as much as digits as its factorization.

3213213309961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 43.

The spelling of 3213213309961 in words is "three trillion, two hundred thirteen billion, two hundred thirteen million, three hundred nine thousand, nine hundred sixty-one".