221411634543361 has 2 divisors, whose sum is σ = 221411634543362. Its totient is φ = 221411634543360.

The previous prime is 221411634543353. The next prime is 221411634543389. The reversal of 221411634543361 is 163345436114122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216998089031025 + 4413545512336 = 14730855^2 + 2100844^2 .

It is a cyclic number.

It is not a de Polignac number, because 221411634543361 - 2³ = 221411634543353 is a prime.

It is a super-2 number, since 2×221411634543361² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221411634543331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110705817271680 + 110705817271681.

It is an arithmetic number, because the mean of its divisors is an integer number (110705817271681).

Almost surely, 2^{221411634543361} is an apocalyptic number.

It is an amenable number.

221411634543361 is a deficient number, since it is larger than the sum of its proper divisors (1).

221411634543361 is an equidigital number, since it uses as much as digits as its factorization.

221411634543361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 46.

The spelling of 221411634543361 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred thirty-four million, five hundred forty-three thousand, three hundred sixty-one".