22121011022101 has 4 divisors (see below), whose sum is σ = 22121022030604. Its totient is φ = 22121000013600.

The previous prime is 22121011022017. The next prime is 22121011022113. The reversal of 22121011022101 is 10122011012122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12711178695076 + 9409832327025 = 3565274^2 + 3067545^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121011022101 - 2³³ = 22112421087509 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 (22121011022161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536870 + ... + 6826711.

It is an arithmetic number, because the mean of its divisors is an integer number (5530255507651).

Almost surely, 2^{22121011022101} is an apocalyptic number.

It is an amenable number.

22121011022101 is a deficient number, since it is larger than the sum of its proper divisors (11008503).

22121011022101 is an equidigital number, since it uses as much as digits as its factorization.

22121011022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11008502.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22121011022101 its reverse (10122011012122), we get a palindrome (32243022034223).

The spelling of 22121011022101 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, twenty-two thousand, one hundred one".