22121001211 has 4 divisors (see below), whose sum is σ = 22135083624. Its totient is φ = 22106918800.

The previous prime is 22121001209. The next prime is 22121001233. The reversal of 22121001211 is 11210012122.

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

It is a cyclic number.

It is not a de Polignac number, because 22121001211 - 2¹ = 22121001209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121001191 and 22121001200.

It is not an unprimeable number, because it can be changed into a prime (22121001011) 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, 7038850 + ... + 7041991.

It is an arithmetic number, because the mean of its divisors is an integer number (5533770906).

Almost surely, 2^22121001211 is an apocalyptic number.

22121001211 is a deficient number, since it is larger than the sum of its proper divisors (14082413).

22121001211 is a wasteful number, since it uses less digits than its factorization.

22121001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14082412.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22121001211 its reverse (11210012122), we get a palindrome (33331013333).

The spelling of 22121001211 in words is "twenty-two billion, one hundred twenty-one million, one thousand, two hundred eleven".