121203310200 has 384 divisors, whose sum is σ = 444177285120. Its totient is φ = 26754393600.

The previous prime is 121203310147. The next prime is 121203310223. The reversal of 121203310200 is 2013302121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121203310200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 123298909 + ... + 123299891.

It is an arithmetic number, because the mean of its divisors is an integer number (1156711680).

Almost surely, 2^121203310200 is an apocalyptic number.

121203310200 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 121203310200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222088642560).

121203310200 is an abundant number, since it is smaller than the sum of its proper divisors (322973974920).

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

121203310200 is a wasteful number, since it uses less digits than its factorization.

121203310200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121203310200 its reverse (2013302121), we get a palindrome (123216612321).

The spelling of 121203310200 in words is "one hundred twenty-one billion, two hundred three million, three hundred ten thousand, two hundred".