135250220401 has 4 divisors (see below), whose sum is σ = 135250975600. Its totient is φ = 135249465204.

The previous prime is 135250220381. The next prime is 135250220419. The reversal of 135250220401 is 104022052531.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 104022052531 = 144511 ⋅719821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135250220401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135250220471) 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, 60370 + ... + 523588.

It is an arithmetic number, because the mean of its divisors is an integer number (33812743900).

Almost surely, 2^135250220401 is an apocalyptic number.

It is an amenable number.

135250220401 is a deficient number, since it is larger than the sum of its proper divisors (755199).

135250220401 is an equidigital number, since it uses as much as digits as its factorization.

135250220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755198.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 135250220401 its reverse (104022052531), we get a palindrome (239272272932).

The spelling of 135250220401 in words is "one hundred thirty-five billion, two hundred fifty million, two hundred twenty thousand, four hundred one".