2221200021123 has 20 divisors (see below), whose sum is σ = 3318138801120. Its totient is φ = 1480777753392.

The previous prime is 2221200021091. The next prime is 2221200021127. The reversal of 2221200021123 is 3211200021222.

It is not a de Polignac number, because 2221200021123 - 2⁵ = 2221200021091 is a prime.

It is a super-2 number, since 2×2221200021123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221200021096 and 2221200021105.

It is not an unprimeable number, because it can be changed into a prime (2221200021127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6590086 + ... + 6918932.

It is an arithmetic number, because the mean of its divisors is an integer number (165906940056).

Almost surely, 2^{2221200021123} is an apocalyptic number.

2221200021123 is a deficient number, since it is larger than the sum of its proper divisors (1096938779997).

2221200021123 is an equidigital number, since it uses as much as digits as its factorization.

2221200021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412248 (or 412239 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2221200021123 its reverse (3211200021222), we get a palindrome (5432400042345).

Subtracting 2221200021123 from its reverse (3211200021222), we obtain a palindrome (990000000099).

The spelling of 2221200021123 in words is "two trillion, two hundred twenty-one billion, two hundred million, twenty-one thousand, one hundred twenty-three".