21022210212011 has 4 divisors (see below), whose sum is σ = 21042212316024. Its totient is φ = 21002208108000.

The previous prime is 21022210212001. The next prime is 21022210212089. The reversal of 21022210212011 is 11021201222012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022210212011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022210212001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10001050430 + ... + 10001052531.

It is an arithmetic number, because the mean of its divisors is an integer number (5260553079006).

Almost surely, 2^{21022210212011} is an apocalyptic number.

21022210212011 is a deficient number, since it is larger than the sum of its proper divisors (20002104013).

21022210212011 is a wasteful number, since it uses less digits than its factorization.

21022210212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20002104012.

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

Adding to 21022210212011 its reverse (11021201222012), we get a palindrome (32043411434023).

The spelling of 21022210212011 in words is "twenty-one trillion, twenty-two billion, two hundred ten million, two hundred twelve thousand, eleven".