1321024134021 has 4 divisors (see below), whose sum is σ = 1761365512032. Its totient is φ = 880682756012.

The previous prime is 1321024134013. The next prime is 1321024134029. The reversal of 1321024134021 is 1204314201231.

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 (1321024134013) and next prime (1321024134029).

It is a cyclic number.

It is not a de Polignac number, because 1321024134021 - 2³ = 1321024134013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321024133982 and 1321024134000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321024134029) 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, 220170689001 + ... + 220170689006.

It is an arithmetic number, because the mean of its divisors is an integer number (440341378008).

Almost surely, 2^{1321024134021} is an apocalyptic number.

It is an amenable number.

1321024134021 is a deficient number, since it is larger than the sum of its proper divisors (440341378011).

1321024134021 is an equidigital number, since it uses as much as digits as its factorization.

1321024134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440341378010.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1321024134021 its reverse (1204314201231), we get a palindrome (2525338335252).

The spelling of 1321024134021 in words is "one trillion, three hundred twenty-one billion, twenty-four million, one hundred thirty-four thousand, twenty-one".