21000001122103 has 8 divisors (see below), whose sum is σ = 21012168135168. Its totient is φ = 20987834548824.

The previous prime is 21000001122073. The next prime is 21000001122109. The reversal of 21000001122103 is 30122110000012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000001122103 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 (21000001122109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175257150 + ... + 175376932.

It is an arithmetic number, because the mean of its divisors is an integer number (2626521016896).

Almost surely, 2^{21000001122103} is an apocalyptic number.

21000001122103 is a deficient number, since it is larger than the sum of its proper divisors (12167013065).

21000001122103 is a wasteful number, since it uses less digits than its factorization.

21000001122103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219893.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21000001122103 its reverse (30122110000012), we get a palindrome (51122111122115).

The spelling of 21000001122103 in words is "twenty-one trillion, one million, one hundred twenty-two thousand, one hundred three".