21120133310206 has 32 divisors (see below), whose sum is σ = 36633640720320. Its totient is φ = 8944677282816.

The previous prime is 21120133310197. The next prime is 21120133310207. The reversal of 21120133310206 is 60201333102112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120133310207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2650431 + ... + 7018906.

It is an arithmetic number, because the mean of its divisors is an integer number (1144801272510).

Almost surely, 2^{21120133310206} is an apocalyptic number.

21120133310206 is a deficient number, since it is larger than the sum of its proper divisors (15513507410114).

21120133310206 is a wasteful number, since it uses less digits than its factorization.

21120133310206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671188.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21120133310206 its reverse (60201333102112), we get a palindrome (81321466412318).

The spelling of 21120133310206 in words is "twenty-one trillion, one hundred twenty billion, one hundred thirty-three million, three hundred ten thousand, two hundred six".