21261162130060 has 12 divisors (see below), whose sum is σ = 44648440473168. Its totient is φ = 8504464852016.

The previous prime is 21261162130057. The next prime is 21261162130067. The reversal of 21261162130060 is 6003126116212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21261162130067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531529053232 + ... + 531529053271.

It is an arithmetic number, because the mean of its divisors is an integer number (3720703372764).

Almost surely, 2^{21261162130060} is an apocalyptic number.

21261162130060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21261162130060 is an abundant number, since it is smaller than the sum of its proper divisors (23387278343108).

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

21261162130060 is a wasteful number, since it uses less digits than its factorization.

21261162130060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063058106512 (or 1063058106510 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

Adding to 21261162130060 its reverse (6003126116212), we get a palindrome (27264288246272).

The spelling of 21261162130060 in words is "twenty-one trillion, two hundred sixty-one billion, one hundred sixty-two million, one hundred thirty thousand, sixty".