1321421103 has 12 divisors (see below), whose sum is σ = 1955274048. Its totient is φ = 859460640.

The previous prime is 1321421099. The next prime is 1321421111. The reversal of 1321421103 is 3011241231.

It is not a de Polignac number, because 1321421103 - 2² = 1321421099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321421183) 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, 1790175 + ... + 1790912.

It is an arithmetic number, because the mean of its divisors is an integer number (162939504).

Almost surely, 2^1321421103 is an apocalyptic number.

1321421103 is a deficient number, since it is larger than the sum of its proper divisors (633852945).

1321421103 is a wasteful number, since it uses less digits than its factorization.

1321421103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581134 (or 3581131 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1321421103 is about 36351.3562745601. The cubic root of 1321421103 is about 1097.3548296561.

Adding to 1321421103 its reverse (3011241231), we get a palindrome (4332662334).

The spelling of 1321421103 in words is "one billion, three hundred twenty-one million, four hundred twenty-one thousand, one hundred three".