13021201000 has 64 divisors (see below), whose sum is σ = 32261982480. Its totient is φ = 4902092800.

The previous prime is 13021200989. The next prime is 13021201007. The reversal of 13021201000 is 10212031.

It can be written as a sum of positive squares in 8 ways, for example, as 293299876 + 12727901124 = 17126^2 + 112818^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13021201007) 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, 365977 + ... + 399976.

Almost surely, 2^13021201000 is an apocalyptic number.

13021201000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13021201000 is an abundant number, since it is smaller than the sum of its proper divisors (19240781480).

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

13021201000 is a wasteful number, since it uses less digits than its factorization.

13021201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765991 (or 765977 counting only the distinct ones).

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

Adding to 13021201000 its reverse (10212031), we get a palindrome (13031413031).

The spelling of 13021201000 in words is "thirteen billion, twenty-one million, two hundred one thousand".