2112221211012 has 36 divisors (see below), whose sum is σ = 5824610007216. Its totient is φ = 640067033520.

The previous prime is 2112221210989. The next prime is 2112221211071. The reversal of 2112221211012 is 2101121222112.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2112221211012² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2666945578 + ... + 2666946369.

Almost surely, 2^{2112221211012} is an apocalyptic number.

2112221211012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2112221211012 is an abundant number, since it is smaller than the sum of its proper divisors (3712388796204).

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

2112221211012 is a wasteful number, since it uses less digits than its factorization.

2112221211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5333891968 (or 5333891963 counting only the distinct ones).

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

Adding to 2112221211012 its reverse (2101121222112), we get a palindrome (4213342433124).

The spelling of 2112221211012 in words is "two trillion, one hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, twelve".