121516111000 has 32 divisors (see below), whose sum is σ = 284347702080. Its totient is φ = 48606444000.

The previous prime is 121516110977. The next prime is 121516111049. The reversal of 121516111000 is 111615121.

It is a super-3 number, since 3×121516111000³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60757056 + ... + 60759055.

It is an arithmetic number, because the mean of its divisors is an integer number (8885865690).

Almost surely, 2^121516111000 is an apocalyptic number.

121516111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121516111000 is an abundant number, since it is smaller than the sum of its proper divisors (162831591080).

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

121516111000 is a wasteful number, since it uses less digits than its factorization.

121516111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121516132 (or 121516118 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 121516111000 its reverse (111615121), we get a palindrome (121627726121).

The spelling of 121516111000 in words is "one hundred twenty-one billion, five hundred sixteen million, one hundred eleven thousand".