16121684124 has 384 divisors, whose sum is σ = 54470062080. Its totient is φ = 4007190528.

The previous prime is 16121684119. The next prime is 16121684143. The reversal of 16121684124 is 42148612161.

16121684124 is a `hidden beast` number, since 1 + 612 + 16 + 8 + 4 + 1 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16500724 + ... + 16501700.

It is an arithmetic number, because the mean of its divisors is an integer number (141849120).

Almost surely, 2^16121684124 is an apocalyptic number.

16121684124 is a gapful number since it is divisible by the number (14) 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 16121684124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27235031040).

16121684124 is an abundant number, since it is smaller than the sum of its proper divisors (38348377956).

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

16121684124 is a wasteful number, since it uses less digits than its factorization.

16121684124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 1098 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The spelling of 16121684124 in words is "sixteen billion, one hundred twenty-one million, six hundred eighty-four thousand, one hundred twenty-four".