21200103012340 has 24 divisors (see below), whose sum is σ = 50880247229952. Its totient is φ = 7268606747040.

The previous prime is 21200103012329. The next prime is 21200103012349. The reversal of 21200103012340 is 4321030100212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200103012349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75714653476 + ... + 75714653755.

It is an arithmetic number, because the mean of its divisors is an integer number (2120010301248).

Almost surely, 2^{21200103012340} is an apocalyptic number.

21200103012340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200103012340 is an abundant number, since it is smaller than the sum of its proper divisors (29680144217612).

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

21200103012340 is a wasteful number, since it uses less digits than its factorization.

21200103012340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151429307247 (or 151429307245 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21200103012340 its reverse (4321030100212), we get a palindrome (25521133112552).

The spelling of 21200103012340 in words is "twenty-one trillion, two hundred billion, one hundred three million, twelve thousand, three hundred forty".