20221111021212 has 72 divisors (see below), whose sum is σ = 51634700797680. Its totient is φ = 6671805715200.

The previous prime is 20221111021169. The next prime is 20221111021277. The reversal of 20221111021212 is 21212011112202.

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

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12544168 + ... + 14064080.

It is an arithmetic number, because the mean of its divisors is an integer number (717148622190).

Almost surely, 2^{20221111021212} is an apocalyptic number.

It is an amenable number.

20221111021212 is an abundant number, since it is smaller than the sum of its proper divisors (31413589776468).

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

20221111021212 is a wasteful number, since it uses less digits than its factorization.

20221111021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523683 (or 1523678 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20221111021212 its reverse (21212011112202), we get a palindrome (41433122133414).

The spelling of 20221111021212 in words is "twenty trillion, two hundred twenty-one billion, one hundred eleven million, twenty-one thousand, two hundred twelve".