135621337037101 has 4 divisors (see below), whose sum is σ = 135943477980604. Its totient is φ = 135299196093600.

The previous prime is 135621337037089. The next prime is 135621337037141. The reversal of 135621337037101 is 101730733126531.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11176491451876 + 124444845585225 = 3343126^2 + 11155485^2 .

It is a cyclic number.

It is not a de Polignac number, because 135621337037101 - 2¹¹ = 135621337035053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135621337037141) 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, 161070471120 + ... + 161070471961.

It is an arithmetic number, because the mean of its divisors is an integer number (33985869495151).

Almost surely, 2^{135621337037101} is an apocalyptic number.

It is an amenable number.

135621337037101 is a deficient number, since it is larger than the sum of its proper divisors (322140943503).

135621337037101 is an equidigital number, since it uses as much as digits as its factorization.

135621337037101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322140943502.

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 135621337037101 in words is "one hundred thirty-five trillion, six hundred twenty-one billion, three hundred thirty-seven million, thirty-seven thousand, one hundred one".