20212311222 has 12 divisors (see below), whose sum is σ = 43793341020. Its totient is φ = 6737437068.

The previous prime is 20212311199. The next prime is 20212311227. The reversal of 20212311222 is 22211321202.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1122906179 = 20212311222 / (2 + 0 + 2 + 1 + 2 + 3 + 1 + 1 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20212311195 and 20212311204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212311227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561453072 + ... + 561453107.

It is an arithmetic number, because the mean of its divisors is an integer number (3649445085).

Almost surely, 2^20212311222 is an apocalyptic number.

20212311222 is an abundant number, since it is smaller than the sum of its proper divisors (23581029798).

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

20212311222 is a wasteful number, since it uses less digits than its factorization.

20212311222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122906187 (or 1122906184 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20212311222 its reverse (22211321202), we get a palindrome (42423632424).

The spelling of 20212311222 in words is "twenty billion, two hundred twelve million, three hundred eleven thousand, two hundred twenty-two".