121442838 has 16 divisors (see below), whose sum is σ = 264966336. Its totient is φ = 36800840.

The previous prime is 121442837. The next prime is 121442857. The reversal of 121442838 is 838244121.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 121442799 and 121442808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919956 + ... + 920087.

It is an arithmetic number, because the mean of its divisors is an integer number (16560396).

Almost surely, 2^121442838 is an apocalyptic number.

121442838 is an abundant number, since it is smaller than the sum of its proper divisors (143523498).

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

121442838 is a wasteful number, since it uses less digits than its factorization.

121442838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840059.

The product of its digits is 12288, while the sum is 33.

The square root of 121442838 is about 11020.1106165047. The cubic root of 121442838 is about 495.2114024072.

Adding to 121442838 its reverse (838244121), we get a palindrome (959686959).

The spelling of 121442838 in words is "one hundred twenty-one million, four hundred forty-two thousand, eight hundred thirty-eight".