22021021213 has 16 divisors (see below), whose sum is σ = 24306877440. Its totient is φ = 19858464000.

The previous prime is 22021021181. The next prime is 22021021219. The reversal of 22021021213 is 31212012022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22021021213 - 2⁵ = 22021021181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021021219) 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, 153633 + ... + 260086.

It is an arithmetic number, because the mean of its divisors is an integer number (1519179840).

Almost surely, 2^22021021213 is an apocalyptic number.

It is an amenable number.

22021021213 is a deficient number, since it is larger than the sum of its proper divisors (2285856227).

22021021213 is a wasteful number, since it uses less digits than its factorization.

22021021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413868.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22021021213 its reverse (31212012022), we get a palindrome (53233033235).

The spelling of 22021021213 in words is "twenty-two billion, twenty-one million, twenty-one thousand, two hundred thirteen".