22001011212 has 12 divisors (see below), whose sum is σ = 51335692856. Its totient is φ = 7333670400.

The previous prime is 22001011199. The next prime is 22001011213. The reversal of 22001011212 is 21211010022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1833417601 = 22001011212 / (2 + 2 + 0 + 0 + 1 + 0 + 1 + 1 + 2 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (22001011213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916708789 + ... + 916708812.

Almost surely, 2^22001011212 is an apocalyptic number.

It is an amenable number.

22001011212 is an abundant number, since it is smaller than the sum of its proper divisors (29334681644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22001011212 is a wasteful number, since it uses less digits than its factorization.

22001011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833417608 (or 1833417606 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22001011212 its reverse (21211010022), we get a palindrome (43212021234).

The spelling of 22001011212 in words is "twenty-two billion, one million, eleven thousand, two hundred twelve".