22011211021212 has 144 divisors (see below), whose sum is σ = 65315367936000. Its totient is φ = 6247268445600.

The previous prime is 22011211021199. The next prime is 22011211021223. The reversal of 22011211021212 is 21212011211022.

22011211021212 is a `hidden beast` number, since 220 + 1 + 1 + 211 + 0 + 21 + 212 = 666.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4038012 + ... + 7767107.

It is an arithmetic number, because the mean of its divisors is an integer number (453578944000).

Almost surely, 2^{22011211021212} is an apocalyptic number.

It is an amenable number.

22011211021212 is an abundant number, since it is smaller than the sum of its proper divisors (43304156914788).

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

22011211021212 is a wasteful number, since it uses less digits than its factorization.

22011211021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11805301 (or 11805282 counting only the distinct ones).

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

Adding to 22011211021212 its reverse (21212011211022), we get a palindrome (43223222232234).

The spelling of 22011211021212 in words is "twenty-two trillion, eleven billion, two hundred eleven million, twenty-one thousand, two hundred twelve".