21000333222123 has 16 divisors (see below), whose sum is σ = 28123709425920. Its totient is φ = 13938593899104.

The previous prime is 21000333222083. The next prime is 21000333222131. The reversal of 21000333222123 is 32122233300012.

It is not a de Polignac number, because 21000333222123 - 2¹⁰ = 21000333221099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000333222093 and 21000333222102.

It is not an unprimeable number, because it can be changed into a prime (21000333222023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19482690 + ... + 20532312.

It is an arithmetic number, because the mean of its divisors is an integer number (1757731839120).

Almost surely, 2^{21000333222123} is an apocalyptic number.

21000333222123 is a deficient number, since it is larger than the sum of its proper divisors (7123376203797).

21000333222123 is a wasteful number, since it uses less digits than its factorization.

21000333222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078978.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21000333222123 its reverse (32122233300012), we get a palindrome (53122566522135).

The spelling of 21000333222123 in words is "twenty-one trillion, three hundred thirty-three million, two hundred twenty-two thousand, one hundred twenty-three".