422011521561 has 32 divisors (see below), whose sum is σ = 647288218368. Its totient is φ = 239567984640.

The previous prime is 422011521541. The next prime is 422011521593. The reversal of 422011521561 is 165125110224.

It is not a de Polignac number, because 422011521561 - 2¹³ = 422011513369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (422011521511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4667221 + ... + 4756781.

It is an arithmetic number, because the mean of its divisors is an integer number (20227756824).

Almost surely, 2^422011521561 is an apocalyptic number.

It is an amenable number.

422011521561 is a deficient number, since it is larger than the sum of its proper divisors (225276696807).

422011521561 is a wasteful number, since it uses less digits than its factorization.

422011521561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91041.

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 422011521561 its reverse (165125110224), we get a palindrome (587136631785).

The spelling of 422011521561 in words is "four hundred twenty-two billion, eleven million, five hundred twenty-one thousand, five hundred sixty-one".