1321213023 has 12 divisors (see below), whose sum is σ = 2055220440. Its totient is φ = 813054096.

The previous prime is 1321213009. The next prime is 1321213037. The reversal of 1321213023 is 3203121231.

It is an interprime number because it is at equal distance from previous prime (1321213009) and next prime (1321213037).

It is not a de Polignac number, because 1321213023 - 2²² = 1317018719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321212987 and 1321213005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321213043) 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, 5646093 + ... + 5646326.

It is an arithmetic number, because the mean of its divisors is an integer number (171268370).

Almost surely, 2^1321213023 is an apocalyptic number.

1321213023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321213023 is a deficient number, since it is larger than the sum of its proper divisors (734007417).

1321213023 is a wasteful number, since it uses less digits than its factorization.

1321213023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11292438 (or 11292435 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1321213023 is about 36348.4940953542. The cubic root of 1321213023 is about 1097.2972276349.

Adding to 1321213023 its reverse (3203121231), we get a palindrome (4524334254).

The spelling of 1321213023 in words is "one billion, three hundred twenty-one million, two hundred thirteen thousand, twenty-three".