121323560 has 32 divisors (see below), whose sum is σ = 289037160. Its totient is φ = 45674496.

The previous prime is 121323547. The next prime is 121323563. The reversal of 121323560 is 65323121.

It can be written as a sum of positive squares in 4 ways, for example, as 80389156 + 40934404 = 8966^2 + 6398^2 .

It is a super-2 number, since 2×121323560² = 29438812422147200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121323563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88529 + ... + 89888.

Almost surely, 2^121323560 is an apocalyptic number.

121323560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121323560 is an abundant number, since it is smaller than the sum of its proper divisors (167713600).

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

121323560 is a wasteful number, since it uses less digits than its factorization.

121323560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178445 (or 178441 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 121323560 is about 11014.6974538568. The cubic root of 121323560 is about 495.0492213748.

Adding to 121323560 its reverse (65323121), we get a palindrome (186646681).

The spelling of 121323560 in words is "one hundred twenty-one million, three hundred twenty-three thousand, five hundred sixty".