135116221001 has 4 divisors (see below), whose sum is σ = 136967128212. Its totient is φ = 133265313792.

The previous prime is 135116220977. The next prime is 135116221027. The reversal of 135116221001 is 100122611531.

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 32562563401 + 102553657600 = 180451^2 + 320240^2 .

It is a cyclic number.

It is not a de Polignac number, because 135116221001 - 2²² = 135112026697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135116221081) 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, 925453496 + ... + 925453641.

It is an arithmetic number, because the mean of its divisors is an integer number (34241782053).

Almost surely, 2^135116221001 is an apocalyptic number.

It is an amenable number.

135116221001 is a deficient number, since it is larger than the sum of its proper divisors (1850907211).

135116221001 is an equidigital number, since it uses as much as digits as its factorization.

135116221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850907210.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 135116221001 its reverse (100122611531), we get a palindrome (235238832532).

The spelling of 135116221001 in words is "one hundred thirty-five billion, one hundred sixteen million, two hundred twenty-one thousand, one".