1221414123 has 4 divisors (see below), whose sum is σ = 1628552168. Its totient is φ = 814276080.

The previous prime is 1221414101. The next prime is 1221414143. The reversal of 1221414123 is 3214141221.

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

It is not a de Polignac number, because 1221414123 - 2¹² = 1221410027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221414123.

It is not an unprimeable number, because it can be changed into a prime (1221414143) 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, 203569018 + ... + 203569023.

It is an arithmetic number, because the mean of its divisors is an integer number (407138042).

Almost surely, 2^1221414123 is an apocalyptic number.

1221414123 is a deficient number, since it is larger than the sum of its proper divisors (407138045).

1221414123 is an equidigital number, since it uses as much as digits as its factorization.

1221414123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407138044.

The product of its digits is 384, while the sum is 21.

The square root of 1221414123 is about 34948.7356423662. The cubic root of 1221414123 is about 1068.9424211385.

Adding to 1221414123 its reverse (3214141221), we get a palindrome (4435555344).

The spelling of 1221414123 in words is "one billion, two hundred twenty-one million, four hundred fourteen thousand, one hundred twenty-three".