2211111211212 has 72 divisors (see below), whose sum is σ = 5596319121120. Its totient is φ = 736098401280.

The previous prime is 2211111211207. The next prime is 2211111211229. The reversal of 2211111211212 is 2121121111122.

It is a happy number.

2211111211212 is a `hidden beast` number, since 221 + 11 + 11 + 211 + 212 = 666.

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236705662 + ... + 236715002.

It is an arithmetic number, because the mean of its divisors is an integer number (77726654460).

Almost surely, 2^{2211111211212} is an apocalyptic number.

It is an amenable number.

2211111211212 is an abundant number, since it is smaller than the sum of its proper divisors (3385207909908).

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

2211111211212 is a wasteful number, since it uses less digits than its factorization.

2211111211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17023 (or 17018 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 2211111211212 its reverse (2121121111122), we get a palindrome (4332232322334).

The spelling of 2211111211212 in words is "two trillion, two hundred eleven billion, one hundred eleven million, two hundred eleven thousand, two hundred twelve".