137562136121 has 4 divisors (see below), whose sum is σ = 137905184244. Its totient is φ = 137219088000.

The previous prime is 137562136109. The next prime is 137562136133. The reversal of 137562136121 is 121631265731.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (137562136109) and next prime (137562136133).

It can be written as a sum of positive squares in 2 ways, for example, as 97056548521 + 40505587600 = 311539^2 + 201260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137562136121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137562136141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171523460 + ... + 171524261.

It is an arithmetic number, because the mean of its divisors is an integer number (34476296061).

Almost surely, 2^137562136121 is an apocalyptic number.

It is an amenable number.

137562136121 is a deficient number, since it is larger than the sum of its proper divisors (343048123).

137562136121 is an equidigital number, since it uses as much as digits as its factorization.

137562136121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343048122.

The product of its digits is 45360, while the sum is 38.

The spelling of 137562136121 in words is "one hundred thirty-seven billion, five hundred sixty-two million, one hundred thirty-six thousand, one hundred twenty-one".