2121111011223 has 24 divisors (see below), whose sum is σ = 3076791523520. Its totient is φ = 1408091351040.

The previous prime is 2121111011191. The next prime is 2121111011353. The reversal of 2121111011223 is 3221101111212.

It is a happy number.

It is not a de Polignac number, because 2121111011223 - 2⁵ = 2121111011191 is a prime.

It is a super-2 number, since 2×2121111011223² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121111011196 and 2121111011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121111021223) 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, 32660898 + ... + 32725776.

Almost surely, 2^{2121111011223} is an apocalyptic number.

2121111011223 is a deficient number, since it is larger than the sum of its proper divisors (955680512297).

2121111011223 is a wasteful number, since it uses less digits than its factorization.

2121111011223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80199 (or 80196 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 2121111011223 its reverse (3221101111212), we get a palindrome (5342212122435).

The spelling of 2121111011223 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, eleven thousand, two hundred twenty-three".