2211212223223 has 4 divisors (see below), whose sum is σ = 2212927672320. Its totient is φ = 2209496774128.

The previous prime is 2211212223041. The next prime is 2211212223251. The reversal of 2211212223223 is 3223222121122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211212223223 is a prime.

It is a super-2 number, since 2×2211212223223² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211212223293) 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, 857722615 + ... + 857725192.

It is an arithmetic number, because the mean of its divisors is an integer number (553231918080).

Almost surely, 2^{2211212223223} is an apocalyptic number.

2211212223223 is a deficient number, since it is larger than the sum of its proper divisors (1715449097).

2211212223223 is a wasteful number, since it uses less digits than its factorization.

2211212223223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715449096.

The product of its digits is 2304, while the sum is 25.

Adding to 2211212223223 its reverse (3223222121122), we get a palindrome (5434434344345).

The spelling of 2211212223223 in words is "two trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty-three thousand, two hundred twenty-three".