21222312023211 has 64 divisors (see below), whose sum is σ = 32348991725568. Its totient is φ = 12259924604928.

The previous prime is 21222312023207. The next prime is 21222312023249. The reversal of 21222312023211 is 11232021322212.

It is not a de Polignac number, because 21222312023211 - 2² = 21222312023207 is a prime.

It is a super-2 number, since 2×21222312023211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222312023291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 439843890 + ... + 439892136.

It is an arithmetic number, because the mean of its divisors is an integer number (505452995712).

Almost surely, 2^{21222312023211} is an apocalyptic number.

21222312023211 is a deficient number, since it is larger than the sum of its proper divisors (11126679702357).

21222312023211 is a wasteful number, since it uses less digits than its factorization.

21222312023211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49980.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21222312023211 its reverse (11232021322212), we get a palindrome (32454333345423).

The spelling of 21222312023211 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred twelve million, twenty-three thousand, two hundred eleven".