22121002122001 has 4 divisors (see below), whose sum is σ = 23285265391600. Its totient is φ = 20956738852404.

The previous prime is 22121002121993. The next prime is 22121002122007. The reversal of 22121002122001 is 10022120012122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22121002122001 - 2³ = 22121002121993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121002122007) 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, 582131634771 + ... + 582131634808.

It is an arithmetic number, because the mean of its divisors is an integer number (5821316347900).

Almost surely, 2^{22121002122001} is an apocalyptic number.

It is an amenable number.

22121002122001 is a deficient number, since it is larger than the sum of its proper divisors (1164263269599).

22121002122001 is a wasteful number, since it uses less digits than its factorization.

22121002122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164263269598.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22121002122001 its reverse (10022120012122), we get a palindrome (32143122134123).

The spelling of 22121002122001 in words is "twenty-two trillion, one hundred twenty-one billion, two million, one hundred twenty-two thousand, one".