10021001320 has 64 divisors (see below), whose sum is σ = 25013966400. Its totient is φ = 3582228480.

The previous prime is 10021001303. The next prime is 10021001321. The reversal of 10021001320 is 2310012001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10021001297 and 10021001306.

It is not an unprimeable number, because it can be changed into a prime (10021001321) 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, 167049 + ... + 218968.

It is an arithmetic number, because the mean of its divisors is an integer number (390843225).

Almost surely, 2^10021001320 is an apocalyptic number.

10021001320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021001320 is an abundant number, since it is smaller than the sum of its proper divisors (14992965080).

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

10021001320 is a wasteful number, since it uses less digits than its factorization.

10021001320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386098 (or 386094 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 10021001320 its reverse (2310012001), we get a palindrome (12331013321).

The spelling of 10021001320 in words is "ten billion, twenty-one million, one thousand, three hundred twenty".