21200022122 has 8 divisors (see below), whose sum is σ = 33473719200. Its totient is φ = 10042115724.

The previous prime is 21200022097. The next prime is 21200022143. The reversal of 21200022122 is 22122000212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21200022097 and 21200022106.

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, 278947622 + ... + 278947697.

It is an arithmetic number, because the mean of its divisors is an integer number (4184214900).

Almost surely, 2^21200022122 is an apocalyptic number.

21200022122 is a deficient number, since it is larger than the sum of its proper divisors (12273697078).

21200022122 is a wasteful number, since it uses less digits than its factorization.

21200022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557895340.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21200022122 its reverse (22122000212), we get a palindrome (43322022334).

The spelling of 21200022122 in words is "twenty-one billion, two hundred million, twenty-two thousand, one hundred twenty-two".