121001023200 has 144 divisors (see below), whose sum is σ = 400534364160. Its totient is φ = 31720005120.

The previous prime is 121001023183. The next prime is 121001023217. The reversal of 121001023200 is 2320100121.

It is an interprime number because it is at equal distance from previous prime (121001023183) and next prime (121001023217).

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 285664 + ... + 568863.

It is an arithmetic number, because the mean of its divisors is an integer number (2781488640).

Almost surely, 2^121001023200 is an apocalyptic number.

121001023200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001023200 is an abundant number, since it is smaller than the sum of its proper divisors (279533340960).

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

121001023200 is a wasteful number, since it uses less digits than its factorization.

121001023200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854609 (or 854596 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 121001023200 its reverse (2320100121), we get a palindrome (123321123321).

The spelling of 121001023200 in words is "one hundred twenty-one billion, one million, twenty-three thousand, two hundred".