1321423101 has 6 divisors (see below), whose sum is σ = 1908722270. Its totient is φ = 880948728.

The previous prime is 1321423093. The next prime is 1321423109. The reversal of 1321423101 is 1013241231.

It is an interprime number because it is at equal distance from previous prime (1321423093) and next prime (1321423109).

It can be written as a sum of positive squares in only one way, i.e., 1318779225 + 2643876 = 36315^2 + 1626^2 .

It is not a de Polignac number, because 1321423101 - 2³ = 1321423093 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 (1321423109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73412386 + ... + 73412403.

Almost surely, 2^1321423101 is an apocalyptic number.

It is an amenable number.

1321423101 is a deficient number, since it is larger than the sum of its proper divisors (587299169).

1321423101 is a wasteful number, since it uses less digits than its factorization.

1321423101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146824795 (or 146824792 counting only the distinct ones).

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

The square root of 1321423101 is about 36351.3837563304. The cubic root of 1321423101 is about 1097.3553827258.

Adding to 1321423101 its reverse (1013241231), we get a palindrome (2334664332).

It can be divided in two parts, 13214 and 23101, that added together give a triangular number (36315 = T₂₆₉).

The spelling of 1321423101 in words is "one billion, three hundred twenty-one million, four hundred twenty-three thousand, one hundred one".