21301121104 has 20 divisors (see below), whose sum is σ = 41299410240. Its totient is φ = 10643208800.

The previous prime is 21301121069. The next prime is 21301121111. The reversal of 21301121104 is 40112110312.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435544 + ... + 481975.

It is an arithmetic number, because the mean of its divisors is an integer number (2064970512).

Almost surely, 2^21301121104 is an apocalyptic number.

It is an amenable number.

21301121104 is a deficient number, since it is larger than the sum of its proper divisors (19998289136).

21301121104 is a wasteful number, since it uses less digits than its factorization.

21301121104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918978 (or 918972 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21301121104 its reverse (40112110312), we get a palindrome (61413231416).

The spelling of 21301121104 in words is "twenty-one billion, three hundred one million, one hundred twenty-one thousand, one hundred four".