22121100001111 has 4 divisors (see below), whose sum is σ = 22124068885224. Its totient is φ = 22118131117000.

The previous prime is 22121100001103. The next prime is 22121100001177. The reversal of 22121100001111 is 11110000112122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22121100001111 - 2³ = 22121100001103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121100001091 and 22121100001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121100001181) 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, 1484430880 + ... + 1484445781.

It is an arithmetic number, because the mean of its divisors is an integer number (5531017221306).

Almost surely, 2^{22121100001111} is an apocalyptic number.

22121100001111 is a deficient number, since it is larger than the sum of its proper divisors (2968884113).

22121100001111 is an equidigital number, since it uses as much as digits as its factorization.

22121100001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968884112.

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

Adding to 22121100001111 its reverse (11110000112122), we get a palindrome (33231100113233).

The spelling of 22121100001111 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred million, one thousand, one hundred eleven".