2211011221212 has 36 divisors (see below), whose sum is σ = 5589143396200. Its totient is φ = 736977582432.

The previous prime is 2211011221169. The next prime is 2211011221247. The reversal of 2211011221212 is 2121221101122.

2211011221212 is a `hidden beast` number, since 221 + 1 + 0 + 11 + 221 + 212 = 666.

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

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47878 + ... + 2103405.

Almost surely, 2^{2211011221212} is an apocalyptic number.

It is an amenable number.

2211011221212 is an abundant number, since it is smaller than the sum of its proper divisors (3378132174988).

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

2211011221212 is a wasteful number, since it uses less digits than its factorization.

2211011221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179842 (or 2179837 counting only the distinct ones).

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

Adding to 2211011221212 its reverse (2121221101122), we get a palindrome (4332232322334).

The spelling of 2211011221212 in words is "two trillion, two hundred eleven billion, eleven million, two hundred twenty-one thousand, two hundred twelve".