204522021611377 has 2 divisors, whose sum is σ = 204522021611378. Its totient is φ = 204522021611376.

The previous prime is 204522021611311. The next prime is 204522021611399. The reversal of 204522021611377 is 773116120225402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198236290688881 + 6285730922496 = 14079641^2 + 2507136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204522021611377 is a prime.

It is a super-2 number, since 2×204522021611377² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204522021711377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102261010805688 + 102261010805689.

It is an arithmetic number, because the mean of its divisors is an integer number (102261010805689).

Almost surely, 2^{204522021611377} is an apocalyptic number.

It is an amenable number.

204522021611377 is a deficient number, since it is larger than the sum of its proper divisors (1).

204522021611377 is an equidigital number, since it uses as much as digits as its factorization.

204522021611377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 43.

Adding to 204522021611377 its reverse (773116120225402), we get a palindrome (977638141836779).

The spelling of 204522021611377 in words is "two hundred four trillion, five hundred twenty-two billion, twenty-one million, six hundred eleven thousand, three hundred seventy-seven".