20212113222 has 40 divisors (see below), whose sum is σ = 51760123536. Its totient is φ = 5774889168.

The previous prime is 20212113193. The next prime is 20212113223. The reversal of 20212113222 is 22231121202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20212113195 and 20212113204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212113223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8910733 + ... + 8913000.

Almost surely, 2^20212113222 is an apocalyptic number.

20212113222 is an abundant number, since it is smaller than the sum of its proper divisors (31548010314).

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

20212113222 is a wasteful number, since it uses less digits than its factorization.

20212113222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17823754 (or 17823745 counting only the distinct ones).

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

Adding to 20212113222 its reverse (22231121202), we get a palindrome (42443234424).

The spelling of 20212113222 in words is "twenty billion, two hundred twelve million, one hundred thirteen thousand, two hundred twenty-two".