1221454103 has 6 divisors (see below), whose sum is σ = 1265026464. Its totient is φ = 1179334184.

The previous prime is 1221454099. The next prime is 1221454139. The reversal of 1221454103 is 3014541221.

It is not a de Polignac number, because 1221454103 - 2² = 1221454099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221454163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 725351 + ... + 727032.

It is an arithmetic number, because the mean of its divisors is an integer number (210837744).

Almost surely, 2^1221454103 is an apocalyptic number.

1221454103 is a deficient number, since it is larger than the sum of its proper divisors (43572361).

1221454103 is an equidigital number, since it uses as much as digits as its factorization.

1221454103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452441 (or 1452412 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1221454103 is about 34949.3076183206. The cubic root of 1221454103 is about 1068.9540840820.

Adding to 1221454103 its reverse (3014541221), we get a palindrome (4235995324).

The spelling of 1221454103 in words is "one billion, two hundred twenty-one million, four hundred fifty-four thousand, one hundred three".