2211122111212 has 24 divisors (see below), whose sum is σ = 4444466566400. Its totient is φ = 942861831120.

The previous prime is 2211122111203. The next prime is 2211122111251. The reversal of 2211122111212 is 2121112211122.

It is a happy number.

It is a super-2 number, since 2×2211122111212² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2211122111212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198408114 + ... + 198419257.

Almost surely, 2^{2211122111212} is an apocalyptic number.

It is an amenable number.

2211122111212 is an abundant number, since it is smaller than the sum of its proper divisors (2233344455188).

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

2211122111212 is a wasteful number, since it uses less digits than its factorization.

2211122111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396827581 (or 396827579 counting only the distinct ones).

The product of its digits is 64, while the sum is 19.

Adding to 2211122111212 its reverse (2121112211122), we get a palindrome (4332234322334).

The spelling of 2211122111212 in words is "two trillion, two hundred eleven billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twelve".