121310200 has 96 divisors (see below), whose sum is σ = 312658560. Its totient is φ = 43401600.

The previous prime is 121310197. The next prime is 121310251. The reversal of 121310200 is 2013121.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 146989 + ... + 147811.

It is an arithmetic number, because the mean of its divisors is an integer number (3256860).

Almost surely, 2^121310200 is an apocalyptic number.

121310200 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 121310200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156329280).

121310200 is an abundant number, since it is smaller than the sum of its proper divisors (191348360).

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

121310200 is a wasteful number, since it uses less digits than its factorization.

121310200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 121310200 is about 11014.0909747468. The cubic root of 121310200 is about 495.0310493056.

Adding to 121310200 its reverse (2013121), we get a palindrome (123323321).

The spelling of 121310200 in words is "one hundred twenty-one million, three hundred ten thousand, two hundred".