22121101001101 has 4 divisors (see below), whose sum is σ = 22424129782012. Its totient is φ = 21818072220192.

The previous prime is 22121101001071. The next prime is 22121101001119. The reversal of 22121101001101 is 10110010112122.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5988836784100 + 16132264217001 = 2447210^2 + 4016499^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121101001101 - 2¹⁵ = 22121100968333 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 (22121101001161) 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, 151514390346 + ... + 151514390491.

It is an arithmetic number, because the mean of its divisors is an integer number (5606032445503).

Almost surely, 2^{22121101001101} is an apocalyptic number.

It is an amenable number.

22121101001101 is a deficient number, since it is larger than the sum of its proper divisors (303028780911).

22121101001101 is an equidigital number, since it uses as much as digits as its factorization.

22121101001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303028780910.

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

Adding to 22121101001101 its reverse (10110010112122), we get a palindrome (32231111113223).

The spelling of 22121101001101 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred one million, one thousand, one hundred one".