1321232242020 has 48 divisors (see below), whose sum is σ = 3701168916480. Its totient is φ = 352164918016.

The previous prime is 1321232242009. The next prime is 1321232242027. The reversal of 1321232242020 is 202422321231.

It is not an unprimeable number, because it can be changed into a prime (1321232242027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4984740 + ... + 5243099.

It is an arithmetic number, because the mean of its divisors is an integer number (77107685760).

Almost surely, 2^{1321232242020} is an apocalyptic number.

1321232242020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321232242020 is an abundant number, since it is smaller than the sum of its proper divisors (2379936674460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321232242020 is a wasteful number, since it uses less digits than its factorization.

1321232242020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230004 (or 10230002 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1321232242020 its reverse (202422321231), we get a palindrome (1523654563251).

The spelling of 1321232242020 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-two million, two hundred forty-two thousand, twenty".