121200016 has 20 divisors (see below), whose sum is σ = 268371712. Its totient is φ = 51942816.

The previous prime is 121200011. The next prime is 121200017. The reversal of 121200016 is 610002121.

It is a junction number, because it is equal to n+sod(n) for n = 121199969 and 121200005.

It is not an unprimeable number, because it can be changed into a prime (121200011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540960 + ... + 541183.

Almost surely, 2^121200016 is an apocalyptic number.

121200016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121200016 is an abundant number, since it is smaller than the sum of its proper divisors (147171696).

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

121200016 is a wasteful number, since it uses less digits than its factorization.

121200016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082158 (or 1082152 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121200016 is about 11009.0878822907. The cubic root of 121200016 is about 494.8811278002.

Adding to 121200016 its reverse (610002121), we get a palindrome (731202137).

The spelling of 121200016 in words is "one hundred twenty-one million, two hundred thousand, sixteen".