12061121560 has 16 divisors (see below), whose sum is σ = 27137523600. Its totient is φ = 4824448608.

The previous prime is 12061121533. The next prime is 12061121561. The reversal of 12061121560 is 6512116021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12061121561) 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, 150763980 + ... + 150764059.

It is an arithmetic number, because the mean of its divisors is an integer number (1696095225).

Almost surely, 2^12061121560 is an apocalyptic number.

12061121560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12061121560 is an abundant number, since it is smaller than the sum of its proper divisors (15076402040).

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

12061121560 is a wasteful number, since it uses less digits than its factorization.

12061121560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301528050 (or 301528046 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 12061121560 its reverse (6512116021), we get a palindrome (18573237581).

The spelling of 12061121560 in words is "twelve billion, sixty-one million, one hundred twenty-one thousand, five hundred sixty".