121398836 has 48 divisors (see below), whose sum is σ = 243855360. Its totient is φ = 52385280.

The previous prime is 121398817. The next prime is 121398839. The reversal of 121398836 is 638893121.

It is a junction number, because it is equal to n+sod(n) for n = 121398793 and 121398802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121398839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168485 + ... + 169203.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^121398836 is an apocalyptic number.

It is an amenable number.

121398836 is an abundant number, since it is smaller than the sum of its proper divisors (122456524).

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

121398836 is a wasteful number, since it uses less digits than its factorization.

121398836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 942 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 121398836 is about 11018.1139946907. The cubic root of 121398836 is about 495.1515857210.

The spelling of 121398836 in words is "one hundred twenty-one million, three hundred ninety-eight thousand, eight hundred thirty-six".