21303111122 has 4 divisors (see below), whose sum is σ = 31954666686. Its totient is φ = 10651555560.

The previous prime is 21303111121. The next prime is 21303111173. The reversal of 21303111122 is 22111130312.

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., 11323300921 + 9979810201 = 106411^2 + 99899^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21303111122.

It is not an unprimeable number, because it can be changed into a prime (21303111121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325777779 + ... + 5325777782.

Almost surely, 2^21303111122 is an apocalyptic number.

21303111122 is a deficient number, since it is larger than the sum of its proper divisors (10651555564).

21303111122 is a wasteful number, since it uses less digits than its factorization.

21303111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10651555563.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21303111122 its reverse (22111130312), we get a palindrome (43414241434).

The spelling of 21303111122 in words is "twenty-one billion, three hundred three million, one hundred eleven thousand, one hundred twenty-two".