21300221121 has 8 divisors (see below), whose sum is σ = 28402746240. Its totient is φ = 14198921712.

The previous prime is 21300221101. The next prime is 21300221141. The reversal of 21300221121 is 12112200312.

It is an interprime number because it is at equal distance from previous prime (21300221101) and next prime (21300221141).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21300221121 - 2⁹ = 21300220609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21300221121.

It is not an unprimeable number, because it can be changed into a prime (21300221101) 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, 265081 + ... + 335958.

It is an arithmetic number, because the mean of its divisors is an integer number (3550343280).

Almost surely, 2^21300221121 is an apocalyptic number.

It is an amenable number.

21300221121 is a deficient number, since it is larger than the sum of its proper divisors (7102525119).

21300221121 is a wasteful number, since it uses less digits than its factorization.

21300221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612855.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21300221121 its reverse (12112200312), we get a palindrome (33412421433).

The spelling of 21300221121 in words is "twenty-one billion, three hundred million, two hundred twenty-one thousand, one hundred twenty-one".