21222021233123 has 8 divisors (see below), whose sum is σ = 21549910613328. Its totient is φ = 20894459582304.

The previous prime is 21222021233089. The next prime is 21222021233167. The reversal of 21222021233123 is 32133212022212.

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 21222021233123 - 2¹⁶ = 21222021167587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222021233092 and 21222021233101.

It is not an unprimeable number, because it can be changed into a prime (21222221233123) 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, 81801836 + ... + 82060857.

It is an arithmetic number, because the mean of its divisors is an integer number (2693738826666).

Almost surely, 2^{21222021233123} is an apocalyptic number.

21222021233123 is a deficient number, since it is larger than the sum of its proper divisors (327889380205).

21222021233123 is a wasteful number, since it uses less digits than its factorization.

21222021233123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163864693.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21222021233123 its reverse (32133212022212), we get a palindrome (53355233255335).

The spelling of 21222021233123 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, two hundred thirty-three thousand, one hundred twenty-three".