22001021111 has 8 divisors (see below), whose sum is σ = 22553224848. Its totient is φ = 21449560000.

The previous prime is 22001021051. The next prime is 22001021173. The reversal of 22001021111 is 11112010022.

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

It is a de Polignac number, because none of the positive numbers 2^k-22001021111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001021092 and 22001021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001021011) 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, 125420 + ... + 244401.

It is an arithmetic number, because the mean of its divisors is an integer number (2819153106).

Almost surely, 2^22001021111 is an apocalyptic number.

22001021111 is a deficient number, since it is larger than the sum of its proper divisors (552203737).

22001021111 is a wasteful number, since it uses less digits than its factorization.

22001021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371313.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 22001021111 its reverse (11112010022), we get a palindrome (33113031133).

The spelling of 22001021111 in words is "twenty-two billion, one million, twenty-one thousand, one hundred eleven".