22212021211 has 4 divisors (see below), whose sum is σ = 23518610712. Its totient is φ = 20905431712.

The previous prime is 22212021197. The next prime is 22212021229. The reversal of 22212021211 is 11212021222.

It is a happy number.

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 22212021211 - 2¹⁵ = 22211988443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22212021241) 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, 653294725 + ... + 653294758.

It is an arithmetic number, because the mean of its divisors is an integer number (5879652678).

Almost surely, 2^22212021211 is an apocalyptic number.

22212021211 is a deficient number, since it is larger than the sum of its proper divisors (1306589501).

22212021211 is a wasteful number, since it uses less digits than its factorization.

22212021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306589500.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22212021211 its reverse (11212021222), we get a palindrome (33424042433).

The spelling of 22212021211 in words is "twenty-two billion, two hundred twelve million, twenty-one thousand, two hundred eleven".