2226131366621 has 2 divisors, whose sum is σ = 2226131366622. Its totient is φ = 2226131366620.

The previous prime is 2226131366609. The next prime is 2226131366639. The reversal of 2226131366621 is 1266631316222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1209089371396 + 1017041995225 = 1099586^2 + 1008485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2226131366621 - 2²² = 2226127172317 is a prime.

It is a super-2 number, since 2×2226131366621² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2226131366321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1113065683310 + 1113065683311.

It is an arithmetic number, because the mean of its divisors is an integer number (1113065683311).

Almost surely, 2^{2226131366621} is an apocalyptic number.

It is an amenable number.

2226131366621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2226131366621 is an equidigital number, since it uses as much as digits as its factorization.

2226131366621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The spelling of 2226131366621 in words is "two trillion, two hundred twenty-six billion, one hundred thirty-one million, three hundred sixty-six thousand, six hundred twenty-one".