22120221001001 has 4 divisors (see below), whose sum is σ = 22138103153412. Its totient is φ = 22102338848592.

The previous prime is 22120221000989. The next prime is 22120221001027. The reversal of 22120221001001 is 10010012202122.

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 13810699875625 + 8309521125376 = 3716275^2 + 2882624^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120221001001 - 2³⁴ = 22103041131817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22120221001061) 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, 8941074350 + ... + 8941076823.

It is an arithmetic number, because the mean of its divisors is an integer number (5534525788353).

Almost surely, 2^{22120221001001} is an apocalyptic number.

It is an amenable number.

22120221001001 is a deficient number, since it is larger than the sum of its proper divisors (17882152411).

22120221001001 is a wasteful number, since it uses less digits than its factorization.

22120221001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17882152410.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22120221001001 its reverse (10010012202122), we get a palindrome (32130233203123).

The spelling of 22120221001001 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty-one million, one thousand, one".