21342003121 has 8 divisors (see below), whose sum is σ = 21371176224. Its totient is φ = 21312851040.

The previous prime is 21342003113. The next prime is 21342003139. The reversal of 21342003121 is 12130024312.

It is a happy number.

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 21342003121 - 2³ = 21342003113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342003191) 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, 3248586 + ... + 3255148.

It is an arithmetic number, because the mean of its divisors is an integer number (2671397028).

Almost surely, 2^21342003121 is an apocalyptic number.

It is an amenable number.

21342003121 is a deficient number, since it is larger than the sum of its proper divisors (29173103).

21342003121 is a wasteful number, since it uses less digits than its factorization.

21342003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21342003121 its reverse (12130024312), we get a palindrome (33472027433).

The spelling of 21342003121 in words is "twenty-one billion, three hundred forty-two million, three thousand, one hundred twenty-one".