21200111122 has 8 divisors (see below), whose sum is σ = 31812679296. Its totient is φ = 10595884692.

The previous prime is 21200111089. The next prime is 21200111131. The reversal of 21200111122 is 22111100212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2079078 + ... + 2089249.

It is an arithmetic number, because the mean of its divisors is an integer number (3976584912).

Almost surely, 2^21200111122 is an apocalyptic number.

21200111122 is a deficient number, since it is larger than the sum of its proper divisors (10612568174).

21200111122 is a wasteful number, since it uses less digits than its factorization.

21200111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170872.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200111122 its reverse (22111100212), we get a palindrome (43311211334).

The spelling of 21200111122 in words is "twenty-one billion, two hundred million, one hundred eleven thousand, one hundred twenty-two".