135620725336121 has 4 divisors (see below), whose sum is σ = 135620765534592. Its totient is φ = 135620685137652.

The previous prime is 135620725336099. The next prime is 135620725336123. The reversal of 135620725336121 is 121633527026531.

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.

It is a cyclic number.

It is not a de Polignac number, because 135620725336121 - 2³⁴ = 135603545466937 is a prime.

It is a super-2 number, since 2×135620725336121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135620725336123) 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, 14522861 + ... + 21958026.

It is an arithmetic number, because the mean of its divisors is an integer number (33905191383648).

Almost surely, 2^{135620725336121} is an apocalyptic number.

It is an amenable number.

135620725336121 is a deficient number, since it is larger than the sum of its proper divisors (40198471).

135620725336121 is an equidigital number, since it uses as much as digits as its factorization.

135620725336121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40198470.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 135620725336121 in words is "one hundred thirty-five trillion, six hundred twenty billion, seven hundred twenty-five million, three hundred thirty-six thousand, one hundred twenty-one".