22121201010111 has 24 divisors (see below), whose sum is σ = 34310762472960. Its totient is φ = 12640565356272.

The previous prime is 22121201010109. The next prime is 22121201010133. The reversal of 22121201010111 is 11101010212122.

It is a happy number.

It is not a de Polignac number, because 22121201010111 - 2¹ = 22121201010109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121201010101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16016530 + ... + 17342768.

It is an arithmetic number, because the mean of its divisors is an integer number (1429615103040).

Almost surely, 2^{22121201010111} is an apocalyptic number.

22121201010111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22121201010111 is a deficient number, since it is larger than the sum of its proper divisors (12189561462849).

22121201010111 is a wasteful number, since it uses less digits than its factorization.

22121201010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439723 (or 1439716 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 22121201010111 its reverse (11101010212122), we get a palindrome (33222211222233).

The spelling of 22121201010111 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred one million, ten thousand, one hundred eleven".