21113012202103 has 4 divisors (see below), whose sum is σ = 21153536218368. Its totient is φ = 21072488185840.

The previous prime is 21113012202077. The next prime is 21113012202143. The reversal of 21113012202103 is 30120221031112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21113012202103 - 2²⁹ = 21112475331191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113012202143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20262007351 + ... + 20262008392.

It is an arithmetic number, because the mean of its divisors is an integer number (5288384054592).

Almost surely, 2^{21113012202103} is an apocalyptic number.

21113012202103 is a deficient number, since it is larger than the sum of its proper divisors (40524016265).

21113012202103 is an equidigital number, since it uses as much as digits as its factorization.

21113012202103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40524016264.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21113012202103 its reverse (30120221031112), we get a palindrome (51233233233215).

The spelling of 21113012202103 in words is "twenty-one trillion, one hundred thirteen billion, twelve million, two hundred two thousand, one hundred three".