21200111022022 has 4 divisors (see below), whose sum is σ = 31800166533036. Its totient is φ = 10600055511010.

The previous prime is 21200111022019. The next prime is 21200111022037. The reversal of 21200111022022 is 22022011100212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21200111021987 and 21200111022005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300027755504 + ... + 5300027755507.

It is an arithmetic number, because the mean of its divisors is an integer number (7950041633259).

Almost surely, 2^{21200111022022} is an apocalyptic number.

21200111022022 is a deficient number, since it is larger than the sum of its proper divisors (10600055511014).

21200111022022 is a wasteful number, since it uses less digits than its factorization.

21200111022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600055511013.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21200111022022 its reverse (22022011100212), we get a palindrome (43222122122234).

The spelling of 21200111022022 in words is "twenty-one trillion, two hundred billion, one hundred eleven million, twenty-two thousand, twenty-two".