121342240400 has 30 divisors (see below), whose sum is σ = 291524733522. Its totient is φ = 48536896000.

The previous prime is 121342240387. The next prime is 121342240403. The reversal of 121342240400 is 4042243121.

It can be written as a sum of positive squares in 3 ways, for example, as 19991697664 + 101350542736 = 141392^2 + 318356^2 .

It is not an unprimeable number, because it can be changed into a prime (121342240403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151677401 + ... + 151678200.

Almost surely, 2^121342240400 is an apocalyptic number.

121342240400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121342240400 is an abundant number, since it is smaller than the sum of its proper divisors (170182493122).

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

121342240400 is a wasteful number, since it uses less digits than its factorization.

121342240400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303355619 (or 303355608 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 121342240400 its reverse (4042243121), we get a palindrome (125384483521).

The spelling of 121342240400 in words is "one hundred twenty-one billion, three hundred forty-two million, two hundred forty thousand, four hundred".