21200111022211 has 8 divisors (see below), whose sum is σ = 23130162695664. Its totient is φ = 19270520824320.

The previous prime is 21200111022203. The next prime is 21200111022263. The reversal of 21200111022211 is 11222011100212.

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

It is a cyclic number.

It is not a de Polignac number, because 21200111022211 - 2³ = 21200111022203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200111022011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115272826 + ... + 115456591.

It is an arithmetic number, because the mean of its divisors is an integer number (2891270336958).

Almost surely, 2^{21200111022211} is an apocalyptic number.

21200111022211 is a deficient number, since it is larger than the sum of its proper divisors (1930051673453).

21200111022211 is a wasteful number, since it uses less digits than its factorization.

21200111022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230737781.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21200111022211 its reverse (11222011100212), we get a palindrome (32422122122423).

The spelling of 21200111022211 in words is "twenty-one trillion, two hundred billion, one hundred eleven million, twenty-two thousand, two hundred eleven".