13021321010100 has 72 divisors (see below), whose sum is σ = 40573100759520. Its totient is φ = 3205248247680.

The previous prime is 13021321010051. The next prime is 13021321010101. The reversal of 13021321010100 is 101012312031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 13021321010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021321010101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1669396230 + ... + 1669404029.

Almost surely, 2^{13021321010100} is an apocalyptic number.

13021321010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13021321010100 is an abundant number, since it is smaller than the sum of its proper divisors (27551779749420).

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

13021321010100 is a wasteful number, since it uses less digits than its factorization.

13021321010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338800289 (or 3338800282 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13021321010100 its reverse (101012312031), we get a palindrome (13122333322131).

The spelling of 13021321010100 in words is "thirteen trillion, twenty-one billion, three hundred twenty-one million, ten thousand, one hundred".