22121001010111 has 4 divisors (see below), whose sum is σ = 22121349474232. Its totient is φ = 22120652545992.

The previous prime is 22121001010039. The next prime is 22121001010183. The reversal of 22121001010111 is 11101010012122.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (22121001010039) and next prime (22121001010183).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121001010111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121001010091 and 22121001010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121001016111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174136821 + ... + 174263806.

It is an arithmetic number, because the mean of its divisors is an integer number (5530337368558).

Almost surely, 2^{22121001010111} is an apocalyptic number.

22121001010111 is a deficient number, since it is larger than the sum of its proper divisors (348464121).

22121001010111 is an equidigital number, since it uses as much as digits as its factorization.

22121001010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348464120.

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

Adding to 22121001010111 its reverse (11101010012122), we get a palindrome (33222011022233).

The spelling of 22121001010111 in words is "twenty-two trillion, one hundred twenty-one billion, one million, ten thousand, one hundred eleven".