135510022221 has 16 divisors (see below), whose sum is σ = 212072313984. Its totient is φ = 75341479104.

The previous prime is 135510022199. The next prime is 135510022229. The reversal of 135510022221 is 122220015531.

It is not a de Polignac number, because 135510022221 - 2¹⁰ = 135510021197 is a prime.

It is a super-2 number, since 2×135510022221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135510022191 and 135510022200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135510022229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87200010 + ... + 87201563.

It is an arithmetic number, because the mean of its divisors is an integer number (13254519624).

Almost surely, 2^135510022221 is an apocalyptic number.

It is an amenable number.

135510022221 is a deficient number, since it is larger than the sum of its proper divisors (76562291763).

135510022221 is a wasteful number, since it uses less digits than its factorization.

135510022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174401620.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 135510022221 its reverse (122220015531), we get a palindrome (257730037752).

The spelling of 135510022221 in words is "one hundred thirty-five billion, five hundred ten million, twenty-two thousand, two hundred twenty-one".