20221121212 has 12 divisors (see below), whose sum is σ = 35986741560. Its totient is φ = 9939195056.

The previous prime is 20221121197. The next prime is 20221121231. The reversal of 20221121212 is 21212112202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42841123 + ... + 42841594.

It is an arithmetic number, because the mean of its divisors is an integer number (2998895130).

Almost surely, 2^20221121212 is an apocalyptic number.

It is an amenable number.

20221121212 is a deficient number, since it is larger than the sum of its proper divisors (15765620348).

20221121212 is a wasteful number, since it uses less digits than its factorization.

20221121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85682780 (or 85682778 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20221121212 its reverse (21212112202), we get a palindrome (41433233414).

The spelling of 20221121212 in words is "twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".