221602631430641 has 2 divisors, whose sum is σ = 221602631430642. Its totient is φ = 221602631430640.

The previous prime is 221602631430601. The next prime is 221602631430659. The reversal of 221602631430641 is 146034136206122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134599535703616 + 87003095727025 = 11601704^2 + 9327545^2 .

It is a cyclic number.

It is not a de Polignac number, because 221602631430641 - 2²⁶ = 221602564321777 is a prime.

It is not a weakly prime, because it can be changed into another prime (221602631430601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110801315715320 + 110801315715321.

It is an arithmetic number, because the mean of its divisors is an integer number (110801315715321).

Almost surely, 2^{221602631430641} is an apocalyptic number.

It is an amenable number.

221602631430641 is a deficient number, since it is larger than the sum of its proper divisors (1).

221602631430641 is an equidigital number, since it uses as much as digits as its factorization.

221602631430641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 41.

Adding to 221602631430641 its reverse (146034136206122), we get a palindrome (367636767636763).

The spelling of 221602631430641 in words is "two hundred twenty-one trillion, six hundred two billion, six hundred thirty-one million, four hundred thirty thousand, six hundred forty-one".