121142137 has 4 divisors (see below), whose sum is σ = 123959440. Its totient is φ = 118324836.

The previous prime is 121142129. The next prime is 121142159. The reversal of 121142137 is 731241121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 731241121 = 13 ⋅56249317.

It is a cyclic number.

It is not a de Polignac number, because 121142137 - 2³ = 121142129 is a prime.

It is a super-3 number, since 3×121142137³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121142237) 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 3 ways as a sum of consecutive naturals, for example, 1408587 + ... + 1408672.

It is an arithmetic number, because the mean of its divisors is an integer number (30989860).

Almost surely, 2^121142137 is an apocalyptic number.

It is an amenable number.

121142137 is a deficient number, since it is larger than the sum of its proper divisors (2817303).

121142137 is an equidigital number, since it uses as much as digits as its factorization.

121142137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817302.

The product of its digits is 336, while the sum is 22.

The square root of 121142137 is about 11006.4588764961. The cubic root of 121142137 is about 494.8023385215.

Adding to 121142137 its reverse (731241121), we get a palindrome (852383258).

The spelling of 121142137 in words is "one hundred twenty-one million, one hundred forty-two thousand, one hundred thirty-seven".