22121100010111 has 4 divisors (see below), whose sum is σ = 22121121638800. Its totient is φ = 22121078381424.

The previous prime is 22121100010091. The next prime is 22121100010133. The reversal of 22121100010111 is 11101000112122.

It is a happy number.

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-22121100010111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121100010091 and 22121100010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121100010181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9199851 + ... + 11352508.

It is an arithmetic number, because the mean of its divisors is an integer number (5530280409700).

Almost surely, 2^{22121100010111} is an apocalyptic number.

22121100010111 is a deficient number, since it is larger than the sum of its proper divisors (21628689).

22121100010111 is a wasteful number, since it uses less digits than its factorization.

22121100010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21628688.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 22121100010111 its reverse (11101000112122), we get a palindrome (33222100122233).

The spelling of 22121100010111 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred million, ten thousand, one hundred eleven".