21513530343122 has 16 divisors (see below), whose sum is σ = 32603480076672. Its totient is φ = 10645793041200.

The previous prime is 21513530343083. The next prime is 21513530343127. The reversal of 21513530343122 is 22134303531512.

It is not an unprimeable number, because it can be changed into a prime (21513530343127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21864968 + ... + 22827699.

It is an arithmetic number, because the mean of its divisors is an integer number (2037717504792).

Almost surely, 2^{21513530343122} is an apocalyptic number.

21513530343122 is a deficient number, since it is larger than the sum of its proper divisors (11089949733550).

21513530343122 is a wasteful number, since it uses less digits than its factorization.

21513530343122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44695153.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 21513530343122 its reverse (22134303531512), we get a palindrome (43647833874634).

The spelling of 21513530343122 in words is "twenty-one trillion, five hundred thirteen billion, five hundred thirty million, three hundred forty-three thousand, one hundred twenty-two".