221232223012123 has 4 divisors (see below), whose sum is σ = 221232315047040. Its totient is φ = 221232130977208.

The previous prime is 221232223012093. The next prime is 221232223012153. The reversal of 221232223012123 is 321210322232122.

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

It is an interprime number because it is at equal distance from previous prime (221232223012093) and next prime (221232223012153).

It is a cyclic number.

It is not a de Polignac number, because 221232223012123 - 2¹⁷ = 221232222881051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221232223012091 and 221232223012100.

It is not an unprimeable number, because it can be changed into a prime (221232223012153) 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, 42312340 + ... + 47252497.

It is an arithmetic number, because the mean of its divisors is an integer number (55308078761760).

Almost surely, 2^{221232223012123} is an apocalyptic number.

221232223012123 is a deficient number, since it is larger than the sum of its proper divisors (92034917).

221232223012123 is an equidigital number, since it uses as much as digits as its factorization.

221232223012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92034916.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 221232223012123 its reverse (321210322232122), we get a palindrome (542442545244245).

The spelling of 221232223012123 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, two hundred twenty-three million, twelve thousand, one hundred twenty-three".