135415221011 has 6 divisors (see below), whose sum is σ = 157523828580. Its totient is φ = 116070189396.

The previous prime is 135415220989. The next prime is 135415221013. The reversal of 135415221011 is 110122514531.

It is a de Polignac number, because none of the positive numbers 2^k-135415221011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135415221013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1381787921 + ... + 1381788018.

It is an arithmetic number, because the mean of its divisors is an integer number (26253971430).

Almost surely, 2^135415221011 is an apocalyptic number.

135415221011 is a deficient number, since it is larger than the sum of its proper divisors (22108607569).

135415221011 is an equidigital number, since it uses as much as digits as its factorization.

135415221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763575953 (or 2763575946 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 135415221011 its reverse (110122514531), we get a palindrome (245537735542).

The spelling of 135415221011 in words is "one hundred thirty-five billion, four hundred fifteen million, two hundred twenty-one thousand, eleven".