21611131602060 has 192 divisors, whose sum is σ = 81245764905984. Its totient is φ = 4145192064000.

The previous prime is 21611131602029. The next prime is 21611131602061. The reversal of 21611131602060 is 6020613111612.

It is a happy number.

21611131602060 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (21611131602061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 179852791 + ... + 179972910.

It is an arithmetic number, because the mean of its divisors is an integer number (423155025552).

Almost surely, 2^{21611131602060} is an apocalyptic number.

21611131602060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21611131602060 is an abundant number, since it is smaller than the sum of its proper divisors (59634633303924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21611131602060 is a wasteful number, since it uses less digits than its factorization.

21611131602060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359825744 (or 359825742 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

Adding to 21611131602060 its reverse (6020613111612), we get a palindrome (27631744713672).

The spelling of 21611131602060 in words is "twenty-one trillion, six hundred eleven billion, one hundred thirty-one million, six hundred two thousand, sixty".