22121100210111 has 32 divisors (see below), whose sum is σ = 35750545056768. Its totient is φ = 11892822416640.

The previous prime is 22121100210067. The next prime is 22121100210137. The reversal of 22121100210111 is 11101200112122.

It is a happy number.

It is not a de Polignac number, because 22121100210111 - 2¹⁵ = 22121100177343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121100210191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375375286 + ... + 375434211.

It is an arithmetic number, because the mean of its divisors is an integer number (1117204533024).

Almost surely, 2^{22121100210111} is an apocalyptic number.

22121100210111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22121100210111 is a deficient number, since it is larger than the sum of its proper divisors (13629444846657).

22121100210111 is a wasteful number, since it uses less digits than its factorization.

22121100210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750809591.

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

Adding to 22121100210111 its reverse (11101200112122), we get a palindrome (33222300322233).

The spelling of 22121100210111 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred million, two hundred ten thousand, one hundred eleven".