13223221961 has 2 divisors, whose sum is σ = 13223221962. Its totient is φ = 13223221960.

The previous prime is 13223221951. The next prime is 13223222011. The reversal of 13223221961 is 16912232231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9340062736 + 3883159225 = 96644^2 + 62315^2 .

It is a cyclic number.

It is not a de Polignac number, because 13223221961 - 2⁶ = 13223221897 is a prime.

It is not a weakly prime, because it can be changed into another prime (13223221951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6611610980 + 6611610981.

It is an arithmetic number, because the mean of its divisors is an integer number (6611610981).

Almost surely, 2^13223221961 is an apocalyptic number.

It is an amenable number.

13223221961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13223221961 is an equidigital number, since it uses as much as digits as its factorization.

13223221961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The spelling of 13223221961 in words is "thirteen billion, two hundred twenty-three million, two hundred twenty-one thousand, nine hundred sixty-one".