121321344400 has 60 divisors (see below), whose sum is σ = 297676161792. Its totient is φ = 47496008320.

The previous prime is 121321344379. The next prime is 121321344401. The reversal of 121321344400 is 4443123121.

It is a super-2 number, since 2×121321344400² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (121321344401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3207832 + ... + 3245431.

Almost surely, 2^121321344400 is an apocalyptic number.

121321344400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121321344400 is an abundant number, since it is smaller than the sum of its proper divisors (176354817392).

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

121321344400 is a wasteful number, since it uses less digits than its factorization.

121321344400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453328 (or 6453317 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 121321344400 its reverse (4443123121), we get a palindrome (125764467521).

The spelling of 121321344400 in words is "one hundred twenty-one billion, three hundred twenty-one million, three hundred forty-four thousand, four hundred".