22121222210111 has 8 divisors (see below), whose sum is σ = 22627074539424. Its totient is φ = 21619989537120.

The previous prime is 22121222210051. The next prime is 22121222210147. The reversal of 22121222210111 is 11101222212122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121222210111 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 (22121222210011) 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, 1154904395 + ... + 1154923548.

It is an arithmetic number, because the mean of its divisors is an integer number (2828384317428).

Almost surely, 2^{22121222210111} is an apocalyptic number.

22121222210111 is a deficient number, since it is larger than the sum of its proper divisors (505852329313).

22121222210111 is a wasteful number, since it uses less digits than its factorization.

22121222210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309828161.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22121222210111 its reverse (11101222212122), we get a palindrome (33222444422233).

The spelling of 22121222210111 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred ten thousand, one hundred eleven".