121243253360 has 160 divisors (see below), whose sum is σ = 309349575360. Its totient is φ = 43987091456.

The previous prime is 121243253357. The next prime is 121243253393. The reversal of 121243253360 is 63352342121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23148662 + ... + 23153898.

It is an arithmetic number, because the mean of its divisors is an integer number (1933434846).

Almost surely, 2^121243253360 is an apocalyptic number.

121243253360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121243253360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154674787680).

121243253360 is an abundant number, since it is smaller than the sum of its proper divisors (188106322000).

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

121243253360 is a wasteful number, since it uses less digits than its factorization.

121243253360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5883 (or 5877 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 121243253360 its reverse (63352342121), we get a palindrome (184595595481).

The spelling of 121243253360 in words is "one hundred twenty-one billion, two hundred forty-three million, two hundred fifty-three thousand, three hundred sixty".