121241400 has 96 divisors (see below), whose sum is σ = 429555840. Its totient is φ = 27711360.

The previous prime is 121241383. The next prime is 121241423. The reversal of 121241400 is 4142121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121241400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10234 + ... + 18633.

It is an arithmetic number, because the mean of its divisors is an integer number (4474540).

Almost surely, 2^121241400 is an apocalyptic number.

121241400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121241400 is an abundant number, since it is smaller than the sum of its proper divisors (308314440).

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

121241400 is a wasteful number, since it uses less digits than its factorization.

121241400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28893 (or 28884 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 121241400 is about 11010.9672599640. The cubic root of 121241400 is about 494.9374474573.

Adding to 121241400 its reverse (4142121), we get a palindrome (125383521).

The spelling of 121241400 in words is "one hundred twenty-one million, two hundred forty-one thousand, four hundred".