22121022221001 has 24 divisors (see below), whose sum is σ = 35428800625920. Its totient is φ = 13186898488800.

The previous prime is 22121022220943. The next prime is 22121022221017. The reversal of 22121022221001 is 10012222012122.

It is a happy number.

22121022221001 is a `hidden beast` number, since 2 + 21 + 210 + 222 + 210 + 0 + 1 = 666.

It is not a de Polignac number, because 22121022221001 - 2¹⁰ = 22121022219977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121022221201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1831507641 + ... + 1831519718.

It is an arithmetic number, because the mean of its divisors is an integer number (1476200026080).

Almost surely, 2^{22121022221001} is an apocalyptic number.

It is an amenable number.

22121022221001 is a deficient number, since it is larger than the sum of its proper divisors (13307778404919).

22121022221001 is a wasteful number, since it uses less digits than its factorization.

22121022221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663027437 (or 3663027434 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22121022221001 its reverse (10012222012122), we get a palindrome (32133244233123).

The spelling of 22121022221001 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, one".