20221111212 has 12 divisors (see below), whose sum is σ = 47182592856. Its totient is φ = 6740370400.

The previous prime is 20221111187. The next prime is 20221111217. The reversal of 20221111212 is 21211112202.

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

It is a junction number, because it is equal to n+sod(n) for n = 20221111191 and 20221111200.

It is not an unprimeable number, because it can be changed into a prime (20221111217) 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, 842546289 + ... + 842546312.

It is an arithmetic number, because the mean of its divisors is an integer number (3931882738).

Almost surely, 2^20221111212 is an apocalyptic number.

It is an amenable number.

20221111212 is an abundant number, since it is smaller than the sum of its proper divisors (26961481644).

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

20221111212 is a wasteful number, since it uses less digits than its factorization.

20221111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685092608 (or 1685092606 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20221111212 its reverse (21211112202), we get a palindrome (41432223414).

The spelling of 20221111212 in words is "twenty billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twelve".