21223203022123 has 16 divisors (see below), whose sum is σ = 22261186088064. Its totient is φ = 20209685690880.

The previous prime is 21223203022121. The next prime is 21223203022127. The reversal of 21223203022123 is 32122030232212.

It is a cyclic number.

It is not a de Polignac number, because 21223203022123 - 2¹ = 21223203022121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223203022121) 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 15 ways as a sum of consecutive naturals, for example, 70622143 + ... + 70922023.

It is an arithmetic number, because the mean of its divisors is an integer number (1391324130504).

Almost surely, 2^{21223203022123} is an apocalyptic number.

21223203022123 is a deficient number, since it is larger than the sum of its proper divisors (1037983065941).

21223203022123 is a wasteful number, since it uses less digits than its factorization.

21223203022123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340662.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21223203022123 its reverse (32122030232212), we get a palindrome (53345233254335).

The spelling of 21223203022123 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred three million, twenty-two thousand, one hundred twenty-three".