21022222122011 has 16 divisors (see below), whose sum is σ = 23417178293088. Its totient is φ = 18711728640000.

The previous prime is 21022222122001. The next prime is 21022222122019. The reversal of 21022222122011 is 11022122222012.

It is a de Polignac number, because none of the positive numbers 2^k-21022222122011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022222122019) 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, 95435990 + ... + 95656011.

It is an arithmetic number, because the mean of its divisors is an integer number (1463573643318).

Almost surely, 2^{21022222122011} is an apocalyptic number.

21022222122011 is a deficient number, since it is larger than the sum of its proper divisors (2394956171077).

21022222122011 is a wasteful number, since it uses less digits than its factorization.

21022222122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191092222.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21022222122011 its reverse (11022122222012), we get a palindrome (32044344344023).

The spelling of 21022222122011 in words is "twenty-one trillion, twenty-two billion, two hundred twenty-two million, one hundred twenty-two thousand, eleven".