135121240023001 has 4 divisors (see below), whose sum is σ = 138416880023604. Its totient is φ = 131825600022400.

The previous prime is 135121240022981. The next prime is 135121240023017. The reversal of 135121240023001 is 100320042121531.

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 6355824197776 + 128765415825225 = 2521076^2 + 11347485^2 .

It is a cyclic number.

It is not a de Polignac number, because 135121240023001 - 2²⁹ = 135120703152089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135121240023701) 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, 1647820000240 + ... + 1647820000321.

It is an arithmetic number, because the mean of its divisors is an integer number (34604220005901).

Almost surely, 2^{135121240023001} is an apocalyptic number.

It is an amenable number.

135121240023001 is a deficient number, since it is larger than the sum of its proper divisors (3295640000603).

135121240023001 is an equidigital number, since it uses as much as digits as its factorization.

135121240023001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295640000602.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 135121240023001 its reverse (100320042121531), we get a palindrome (235441282144532).

The spelling of 135121240023001 in words is "one hundred thirty-five trillion, one hundred twenty-one billion, two hundred forty million, twenty-three thousand, one".