21100022211 has 8 divisors (see below), whose sum is σ = 28411911504. Its totient is φ = 13927407200.

The previous prime is 21100022173. The next prime is 21100022263. The reversal of 21100022211 is 11222000112.

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 21100022211 - 2⁶ = 21100022147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100042211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34818216 + ... + 34818821.

It is an arithmetic number, because the mean of its divisors is an integer number (3551488938).

Almost surely, 2^21100022211 is an apocalyptic number.

21100022211 is a deficient number, since it is larger than the sum of its proper divisors (7311889293).

21100022211 is a wasteful number, since it uses less digits than its factorization.

21100022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69637141.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21100022211 its reverse (11222000112), we get a palindrome (32322022323).

The spelling of 21100022211 in words is "twenty-one billion, one hundred million, twenty-two thousand, two hundred eleven".