2211220012212 has 18 divisors (see below), whose sum is σ = 5589472808738. Its totient is φ = 737073337392.

The previous prime is 2211220012193. The next prime is 2211220012219. The reversal of 2211220012212 is 2122100221122.

It is a happy number.

2211220012212 is a `hidden beast` number, since 221 + 1 + 220 + 0 + 1 + 221 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2018144136996 + 193075875216 = 1420614^2 + 439404^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211220012219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30711389023 + ... + 30711389094.

Almost surely, 2^{2211220012212} is an apocalyptic number.

It is an amenable number.

2211220012212 is an abundant number, since it is smaller than the sum of its proper divisors (3378252796526).

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

2211220012212 is a wasteful number, since it uses less digits than its factorization.

2211220012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61422778127 (or 61422778122 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2211220012212 its reverse (2122100221122), we get a palindrome (4333320233334).

The spelling of 2211220012212 in words is "two trillion, two hundred eleven billion, two hundred twenty million, twelve thousand, two hundred twelve".