121442837 has 2 divisors, whose sum is σ = 121442838. Its totient is φ = 121442836.

The previous prime is 121442833. The next prime is 121442857. The reversal of 121442837 is 738244121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107350321 + 14092516 = 10361^2 + 3754^2 .

It is an emirp because it is prime and its reverse (738244121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121442837 - 2² = 121442833 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 60721418 + 60721419.

It is an arithmetic number, because the mean of its divisors is an integer number (60721419).

Almost surely, 2^121442837 is an apocalyptic number.

It is an amenable number.

121442837 is a deficient number, since it is larger than the sum of its proper divisors (1).

121442837 is an equidigital number, since it uses as much as digits as its factorization.

121442837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 32.

The square root of 121442837 is about 11020.1105711331. The cubic root of 121442837 is about 495.2114010479.

Adding to 121442837 its reverse (738244121), we get a palindrome (859686958).

The spelling of 121442837 in words is "one hundred twenty-one million, four hundred forty-two thousand, eight hundred thirty-seven".