21601562230162 has 16 divisors (see below), whose sum is σ = 34308461203992. Its totient is φ = 10165412112640.

The previous prime is 21601562230117. The next prime is 21601562230169. The reversal of 21601562230162 is 26103226510612.

It can be written as a sum of positive squares in 4 ways, for example, as 20182816815841 + 1418745414321 = 4492529^2 + 1191111^2 .

It is a super-2 number, since 2×21601562230162² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21601562230169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15559848 + ... + 16891180.

Almost surely, 2^{21601562230162} is an apocalyptic number.

21601562230162 is a deficient number, since it is larger than the sum of its proper divisors (12706898973830).

21601562230162 is a wasteful number, since it uses less digits than its factorization.

21601562230162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808573.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 21601562230162 its reverse (26103226510612), we get a palindrome (47704788740774).

The spelling of 21601562230162 in words is "twenty-one trillion, six hundred one billion, five hundred sixty-two million, two hundred thirty thousand, one hundred sixty-two".