121442438 has 32 divisors (see below), whose sum is σ = 211341312. Its totient is φ = 51876000.

The previous prime is 121442437. The next prime is 121442443. The reversal of 121442438 is 834244121.

It is a self number, because there is not a number n which added to its sum of digits gives 121442438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442437) 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, 15263 + ... + 21813.

It is an arithmetic number, because the mean of its divisors is an integer number (6604416).

Almost surely, 2^121442438 is an apocalyptic number.

121442438 is a deficient number, since it is larger than the sum of its proper divisors (89898874).

121442438 is a wasteful number, since it uses less digits than its factorization.

121442438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620.

The product of its digits is 6144, while the sum is 29.

The square root of 121442438 is about 11020.0924678516. The cubic root of 121442438 is about 495.2108587089.

Adding to 121442438 its reverse (834244121), we get a palindrome (955686559).

The spelling of 121442438 in words is "one hundred twenty-one million, four hundred forty-two thousand, four hundred thirty-eight".