20222121212 has 12 divisors (see below), whose sum is σ = 35389708200. Its totient is φ = 10110776016.

The previous prime is 20222121181. The next prime is 20222121217. The reversal of 20222121212 is 21212122202.

It is a happy number.

It is a super-3 number, since 3×20222121212³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222121217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237539 + ... + 311237.

It is an arithmetic number, because the mean of its divisors is an integer number (2949142350).

Almost surely, 2^20222121212 is an apocalyptic number.

It is an amenable number.

20222121212 is a deficient number, since it is larger than the sum of its proper divisors (15167586988).

20222121212 is a wasteful number, since it uses less digits than its factorization.

20222121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142300 (or 142298 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20222121212 its reverse (21212122202), we get a palindrome (41434243414).

The spelling of 20222121212 in words is "twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".