1001221323020 has 24 divisors (see below), whose sum is σ = 2103171025200. Its totient is φ = 400373053632.

The previous prime is 1001221323019. The next prime is 1001221323049. The reversal of 1001221323020 is 203231221001.

1001221323020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1001221323020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7146110 + ... + 7284869.

It is an arithmetic number, because the mean of its divisors is an integer number (87632126050).

Almost surely, 2^{1001221323020} is an apocalyptic number.

1001221323020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001221323020 is an abundant number, since it is smaller than the sum of its proper divisors (1101949702180).

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

1001221323020 is a wasteful number, since it uses less digits than its factorization.

1001221323020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14434457 (or 14434455 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1001221323020 its reverse (203231221001), we get a palindrome (1204452544021).

The spelling of 1001221323020 in words is "one trillion, one billion, two hundred twenty-one million, three hundred twenty-three thousand, twenty".