22121102212111 has 4 divisors (see below), whose sum is σ = 25281259670992. Its totient is φ = 18960944753232.

The previous prime is 22121102212103. The next prime is 22121102212193. The reversal of 22121102212111 is 11121220112122.

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 22121102212111 - 2³ = 22121102212103 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 (22121103212111) 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, 1580078729430 + ... + 1580078729443.

It is an arithmetic number, because the mean of its divisors is an integer number (6320314917748).

Almost surely, 2^{22121102212111} is an apocalyptic number.

22121102212111 is a deficient number, since it is larger than the sum of its proper divisors (3160157458881).

22121102212111 is an equidigital number, since it uses as much as digits as its factorization.

22121102212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160157458880.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22121102212111 its reverse (11121220112122), we get a palindrome (33242322324233).

The spelling of 22121102212111 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred twelve thousand, one hundred eleven".