221211001222123 has 8 divisors (see below), whose sum is σ = 241321812408576. Its totient is φ = 201100310063400.

The previous prime is 221211001222121. The next prime is 221211001222129. The reversal of 221211001222123 is 321222100112122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221211001222123 - 2¹ = 221211001222121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221211001222094 and 221211001222103.

It is not an unprimeable number, because it can be changed into a prime (221211001222121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26131623 + ... + 33545248.

It is an arithmetic number, because the mean of its divisors is an integer number (30165226551072).

Almost surely, 2^{221211001222123} is an apocalyptic number.

221211001222123 is a deficient number, since it is larger than the sum of its proper divisors (20110811186453).

221211001222123 is a wasteful number, since it uses less digits than its factorization.

221211001222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60013865.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 221211001222123 its reverse (321222100112122), we get a palindrome (542433101334245).

The spelling of 221211001222123 in words is "two hundred twenty-one trillion, two hundred eleven billion, one million, two hundred twenty-two thousand, one hundred twenty-three".