1214221403 has 4 divisors (see below), whose sum is σ = 1215173520. Its totient is φ = 1213269288.

The previous prime is 1214221373. The next prime is 1214221417. The reversal of 1214221403 is 3041224121.

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

It is a cyclic number.

It is not a de Polignac number, because 1214221403 - 2¹² = 1214217307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1214241403) 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, 474143 + ... + 476696.

It is an arithmetic number, because the mean of its divisors is an integer number (303793380).

Almost surely, 2^1214221403 is an apocalyptic number.

1214221403 is a deficient number, since it is larger than the sum of its proper divisors (952117).

1214221403 is an equidigital number, since it uses as much as digits as its factorization.

1214221403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952116.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1214221403 is about 34845.6798326564. The cubic root of 1214221403 is about 1066.8400096000.

Adding to 1214221403 its reverse (3041224121), we get a palindrome (4255445524).

The spelling of 1214221403 in words is "one billion, two hundred fourteen million, two hundred twenty-one thousand, four hundred three".