121818872 has 64 divisors (see below), whose sum is σ = 283227840. Its totient is φ = 47923200.

The previous prime is 121818863. The next prime is 121818881. The reversal of 121818872 is 278818121.

It is an interprime number because it is at equal distance from previous prime (121818863) and next prime (121818881).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37472 + ... + 40592.

It is an arithmetic number, because the mean of its divisors is an integer number (4425435).

Almost surely, 2^121818872 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 121818872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141613920).

121818872 is an abundant number, since it is smaller than the sum of its proper divisors (161408968).

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

121818872 is a wasteful number, since it uses less digits than its factorization.

121818872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192 (or 3188 counting only the distinct ones).

The product of its digits is 14336, while the sum is 38.

The square root of 121818872 is about 11037.1586923447. The cubic root of 121818872 is about 495.7219977848.

The spelling of 121818872 in words is "one hundred twenty-one million, eight hundred eighteen thousand, eight hundred seventy-two".