21123101120003 has 8 divisors (see below), whose sum is σ = 21204140539296. Its totient is φ = 21042103320000.

The previous prime is 21123101119999. The next prime is 21123101120039. The reversal of 21123101120003 is 30002110132112.

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

It is a cyclic number.

It is not a de Polignac number, because 21123101120003 - 2² = 21123101119999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21123101120063) 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, 9387623 + ... + 11418128.

It is an arithmetic number, because the mean of its divisors is an integer number (2650517567412).

Almost surely, 2^{21123101120003} is an apocalyptic number.

21123101120003 is a deficient number, since it is larger than the sum of its proper divisors (81039419293).

21123101120003 is a wasteful number, since it uses less digits than its factorization.

21123101120003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20809645.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21123101120003 its reverse (30002110132112), we get a palindrome (51125211252115).

The spelling of 21123101120003 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred one million, one hundred twenty thousand, three".