13421022661 has 2 divisors, whose sum is σ = 13421022662. Its totient is φ = 13421022660.

The previous prime is 13421022611. The next prime is 13421022707. The reversal of 13421022661 is 16622012431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11297564100 + 2123458561 = 106290^2 + 46081^2 .

It is a cyclic number.

It is not a de Polignac number, because 13421022661 - 2¹⁵ = 13420989893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13421022611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6710511330 + 6710511331.

It is an arithmetic number, because the mean of its divisors is an integer number (6710511331).

Almost surely, 2^13421022661 is an apocalyptic number.

It is an amenable number.

13421022661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421022661 is an equidigital number, since it uses as much as digits as its factorization.

13421022661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 13421022661 in words is "thirteen billion, four hundred twenty-one million, twenty-two thousand, six hundred sixty-one".