2211212221212 has 24 divisors (see below), whose sum is σ = 5160522497536. Its totient is φ = 736923981168.

The previous prime is 2211212221201. The next prime is 2211212221259. The reversal of 2211212221212 is 2121222121122.

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

It is a congruent number.

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, 18282118 + ... + 18402669.

Almost surely, 2^{2211212221212} is an apocalyptic number.

It is an amenable number.

2211212221212 is an abundant number, since it is smaller than the sum of its proper divisors (2949310276324).

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

2211212221212 is a wasteful number, since it uses less digits than its factorization.

2211212221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36689817 (or 36689815 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

Adding to 2211212221212 its reverse (2121222121122), we get a palindrome (4332434342334).

The spelling of 2211212221212 in words is "two trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twelve".