21223300121111 has 4 divisors (see below), whose sum is σ = 23152691041224. Its totient is φ = 19293909201000.

The previous prime is 21223300121077. The next prime is 21223300121123. The reversal of 21223300121111 is 11112100332212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223300121111 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 (21223300121911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964695460040 + ... + 964695460061.

It is an arithmetic number, because the mean of its divisors is an integer number (5788172760306).

Almost surely, 2^{21223300121111} is an apocalyptic number.

21223300121111 is a deficient number, since it is larger than the sum of its proper divisors (1929390920113).

21223300121111 is a wasteful number, since it uses less digits than its factorization.

21223300121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929390920112.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21223300121111 its reverse (11112100332212), we get a palindrome (32335400453323).

The spelling of 21223300121111 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred million, one hundred twenty-one thousand, one hundred eleven".