21330113122 has 4 divisors (see below), whose sum is σ = 31995169686. Its totient is φ = 10665056560.

The previous prime is 21330113117. The next prime is 21330113143. The reversal of 21330113122 is 22131103312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19793394721 + 1536718401 = 140689^2 + 39201^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21330113122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332528279 + ... + 5332528282.

Almost surely, 2^21330113122 is an apocalyptic number.

21330113122 is a deficient number, since it is larger than the sum of its proper divisors (10665056564).

21330113122 is a wasteful number, since it uses less digits than its factorization.

21330113122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10665056563.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21330113122 its reverse (22131103312), we get a palindrome (43461216434).

The spelling of 21330113122 in words is "twenty-one billion, three hundred thirty million, one hundred thirteen thousand, one hundred twenty-two".