221412123 has 12 divisors (see below), whose sum is σ = 331662968. Its totient is φ = 147607920.

The previous prime is 221412119. The next prime is 221412133. The reversal of 221412123 is 321214122.

It is a happy number.

It is not a de Polignac number, because 221412123 - 2² = 221412119 is a prime.

It is a super-2 number, since 2×221412123² = 98046656422734258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221412096 and 221412105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221412133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 455338 + ... + 455823.

Almost surely, 2^221412123 is an apocalyptic number.

221412123 is a deficient number, since it is larger than the sum of its proper divisors (110250845).

221412123 is an frugal number, since it uses more digits than its factorization.

221412123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911176 (or 911164 counting only the distinct ones).

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

The square root of 221412123 is about 14879.9234877065. The cubic root of 221412123 is about 604.9699440935.

Adding to 221412123 its reverse (321214122), we get a palindrome (542626245).

It can be divided in two parts, 2214121 and 23, that added together give a square (2214144 = 1488²).

The spelling of 221412123 in words is "two hundred twenty-one million, four hundred twelve thousand, one hundred twenty-three".