22112122221001 has 4 divisors (see below), whose sum is σ = 22113736611732. Its totient is φ = 22110507830272.

The previous prime is 22112122220987. The next prime is 22112122221053. The reversal of 22112122221001 is 10012222121122.

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 574874822025 + 21537247398976 = 758205^2 + 4640824^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112122221001 - 2³⁷ = 21974683267529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22112122221001.

It is not an unprimeable number, because it can be changed into a prime (22112122227001) 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, 807174820 + ... + 807202213.

It is an arithmetic number, because the mean of its divisors is an integer number (5528434152933).

Almost surely, 2^{22112122221001} is an apocalyptic number.

It is an amenable number.

22112122221001 is a deficient number, since it is larger than the sum of its proper divisors (1614390731).

22112122221001 is a wasteful number, since it uses less digits than its factorization.

22112122221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614390730.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22112122221001 its reverse (10012222121122), we get a palindrome (32124344342123).

The spelling of 22112122221001 in words is "twenty-two trillion, one hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, one".