21011213001300 has 72 divisors (see below), whose sum is σ = 60871088438496. Its totient is φ = 5595741701760.

The previous prime is 21011213001299. The next prime is 21011213001313. The reversal of 21011213001300 is 310031211012.

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 21011213001300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45070414 + ... + 45534213.

It is an arithmetic number, because the mean of its divisors is an integer number (845431783868).

Almost surely, 2^{21011213001300} is an apocalyptic number.

21011213001300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011213001300 is an abundant number, since it is smaller than the sum of its proper divisors (39859875437196).

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

21011213001300 is a wasteful number, since it uses less digits than its factorization.

21011213001300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90605417 (or 90605410 counting only the distinct ones).

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

Adding to 21011213001300 its reverse (310031211012), we get a palindrome (21321244212312).

The spelling of 21011213001300 in words is "twenty-one trillion, eleven billion, two hundred thirteen million, one thousand, three hundred".