1330123421 has 4 divisors (see below), whose sum is σ = 1451043744. Its totient is φ = 1209203100.

The previous prime is 1330123409. The next prime is 1330123433. The reversal of 1330123421 is 1243210331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1330123409) and next prime (1330123433).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330123421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1330123393 and 1330123402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330123121) 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, 60460145 + ... + 60460166.

It is an arithmetic number, because the mean of its divisors is an integer number (362760936).

Almost surely, 2^1330123421 is an apocalyptic number.

1330123421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1330123421 is a deficient number, since it is larger than the sum of its proper divisors (120920323).

1330123421 is a wasteful number, since it uses less digits than its factorization.

1330123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120920322.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1330123421 is about 36470.8571464944. The cubic root of 1330123421 is about 1099.7584651502.

Adding to 1330123421 its reverse (1243210331), we get a palindrome (2573333752).

The spelling of 1330123421 in words is "one billion, three hundred thirty million, one hundred twenty-three thousand, four hundred twenty-one".