22001021213 has 2 divisors, whose sum is σ = 22001021214. Its totient is φ = 22001021212.

The previous prime is 22001021173. The next prime is 22001021279. The reversal of 22001021213 is 31212010022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19925580964 + 2075440249 = 141158^2 + 45557^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001021213 - 2¹⁸ = 22000759069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22001021513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000510606 + 11000510607.

It is an arithmetic number, because the mean of its divisors is an integer number (11000510607).

Almost surely, 2^22001021213 is an apocalyptic number.

It is an amenable number.

22001021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001021213 is an equidigital number, since it uses as much as digits as its factorization.

22001021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 22001021213 its reverse (31212010022), we get a palindrome (53213031235).

The spelling of 22001021213 in words is "twenty-two billion, one million, twenty-one thousand, two hundred thirteen".