121200512 has 64 divisors (see below), whose sum is σ = 253000800. Its totient is φ = 57759744.

The previous prime is 121200491. The next prime is 121200517. The reversal of 121200512 is 215002121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382178 + ... + 382494.

Almost surely, 2^121200512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121200512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126500400).

121200512 is an abundant number, since it is smaller than the sum of its proper divisors (131800288).

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

121200512 is a wasteful number, since it uses less digits than its factorization.

121200512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 121200512 is about 11009.1104091112. The cubic root of 121200512 is about 494.8818028846.

Adding to 121200512 its reverse (215002121), we get a palindrome (336202633).

The spelling of 121200512 in words is "one hundred twenty-one million, two hundred thousand, five hundred twelve".