2211212220311 has 4 divisors (see below), whose sum is σ = 2212829787312. Its totient is φ = 2209594653312.

The previous prime is 2211212220271. The next prime is 2211212220313. The reversal of 2211212220311 is 1130222121122.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-2211212220311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211212220313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808781450 + ... + 808784183.

It is an arithmetic number, because the mean of its divisors is an integer number (553207446828).

Almost surely, 2^{2211212220311} is an apocalyptic number.

2211212220311 is a deficient number, since it is larger than the sum of its proper divisors (1617567001).

2211212220311 is a wasteful number, since it uses less digits than its factorization.

2211212220311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617567000.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2211212220311 its reverse (1130222121122), we get a palindrome (3341434341433).

The spelling of 2211212220311 in words is "two trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty thousand, three hundred eleven".