121042137 has 16 divisors (see below), whose sum is σ = 164985408. Its totient is φ = 78916800.

The previous prime is 121042111. The next prime is 121042139. The reversal of 121042137 is 731240121.

It is not a de Polignac number, because 121042137 - 2¹² = 121038041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121042139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22743 + ... + 27555.

It is an arithmetic number, because the mean of its divisors is an integer number (10311588).

Almost surely, 2^121042137 is an apocalyptic number.

It is an amenable number.

121042137 is a deficient number, since it is larger than the sum of its proper divisors (43943271).

121042137 is a wasteful number, since it uses less digits than its factorization.

121042137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 121042137 is about 11001.9151514634. The cubic root of 121042137 is about 494.6661517901. Note that the first 3 decimals are identical.

Adding to 121042137 its reverse (731240121), we get a palindrome (852282258).

It can be divided in two parts, 12104 and 2137, that added together give a palindrome (14241).

The spelling of 121042137 in words is "one hundred twenty-one million, forty-two thousand, one hundred thirty-seven".