21021120022211 has 16 divisors (see below), whose sum is σ = 21801068814336. Its totient is φ = 20255379129216.

The previous prime is 21021120022159. The next prime is 21021120022213. The reversal of 21021120022211 is 11222002112012.

It is a cyclic number.

It is not a de Polignac number, because 21021120022211 - 2²⁶ = 21021052913347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21021120022211.

It is not an unprimeable number, because it can be changed into a prime (21021120022213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3717470 + ... + 7474076.

It is an arithmetic number, because the mean of its divisors is an integer number (1362566800896).

Almost surely, 2^{21021120022211} is an apocalyptic number.

21021120022211 is a deficient number, since it is larger than the sum of its proper divisors (779948792125).

21021120022211 is a wasteful number, since it uses less digits than its factorization.

21021120022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758498.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21021120022211 its reverse (11222002112012), we get a palindrome (32243122134223).

The spelling of 21021120022211 in words is "twenty-one trillion, twenty-one billion, one hundred twenty million, twenty-two thousand, two hundred eleven".