21123321301 has 8 divisors (see below), whose sum is σ = 21387431520. Its totient is φ = 20859440112.

The previous prime is 21123321283. The next prime is 21123321379. The reversal of 21123321301 is 10312332112.

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 21123321301 - 2¹⁹ = 21122797013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123321001) 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, 132246 + ... + 244408.

It is an arithmetic number, because the mean of its divisors is an integer number (2673428940).

Almost surely, 2^21123321301 is an apocalyptic number.

It is an amenable number.

21123321301 is a deficient number, since it is larger than the sum of its proper divisors (264110219).

21123321301 is a wasteful number, since it uses less digits than its factorization.

21123321301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114515.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21123321301 its reverse (10312332112), we get a palindrome (31435653413).

The spelling of 21123321301 in words is "twenty-one billion, one hundred twenty-three million, three hundred twenty-one thousand, three hundred one".