1323020525021 has 4 divisors (see below), whose sum is σ = 1424791334652. Its totient is φ = 1221249715392.

The previous prime is 1323020524999. The next prime is 1323020525033. The reversal of 1323020525021 is 1205250203231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 334465588900 + 988554936121 = 578330^2 + 994261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323020525021 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 (1323020525521) 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, 50885404796 + ... + 50885404821.

It is an arithmetic number, because the mean of its divisors is an integer number (356197833663).

Almost surely, 2^{1323020525021} is an apocalyptic number.

It is an amenable number.

1323020525021 is a deficient number, since it is larger than the sum of its proper divisors (101770809631).

1323020525021 is a wasteful number, since it uses less digits than its factorization.

1323020525021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101770809630.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 1323020525021 its reverse (1205250203231), we get a palindrome (2528270728252).

The spelling of 1323020525021 in words is "one trillion, three hundred twenty-three billion, twenty million, five hundred twenty-five thousand, twenty-one".