2111212211211 has 24 divisors (see below), whose sum is σ = 3226161120000. Its totient is φ = 1326696676272.

The previous prime is 2111212211209. The next prime is 2111212211219. The reversal of 2111212211211 is 1121122121112.

It is a happy number.

2111212211211 is a `hidden beast` number, since 21 + 11 + 212 + 211 + 211 = 666.

It is not a de Polignac number, because 2111212211211 - 2¹ = 2111212211209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111212211219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30986751 + ... + 31054808.

It is an arithmetic number, because the mean of its divisors is an integer number (134423380000).

Almost surely, 2^{2111212211211} is an apocalyptic number.

2111212211211 is a deficient number, since it is larger than the sum of its proper divisors (1114948908789).

2111212211211 is a wasteful number, since it uses less digits than its factorization.

2111212211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62041783 (or 62041780 counting only the distinct ones).

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

Adding to 2111212211211 its reverse (1121122121112), we get a palindrome (3232334332323).

Subtracting from 2111212211211 its reverse (1121122121112), we obtain a palindrome (990090090099).

The spelling of 2111212211211 in words is "two trillion, one hundred eleven billion, two hundred twelve million, two hundred eleven thousand, two hundred eleven".