21201422342123 has 8 divisors (see below), whose sum is σ = 21737767213680. Its totient is φ = 20665993518720.

The previous prime is 21201422342099. The next prime is 21201422342129. The reversal of 21201422342123 is 32124322410212.

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 21201422342123 - 2¹² = 21201422338027 is a prime.

It is a super-3 number, since 3×21201422342123³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201422342129) 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, 228965165 + ... + 229057742.

It is an arithmetic number, because the mean of its divisors is an integer number (2717220901710).

Almost surely, 2^{21201422342123} is an apocalyptic number.

21201422342123 is a deficient number, since it is larger than the sum of its proper divisors (536344871557).

21201422342123 is a wasteful number, since it uses less digits than its factorization.

21201422342123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458024077.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21201422342123 its reverse (32124322410212), we get a palindrome (53325744752335).

The spelling of 21201422342123 in words is "twenty-one trillion, two hundred one billion, four hundred twenty-two million, three hundred forty-two thousand, one hundred twenty-three".