22121020001001 has 16 divisors (see below), whose sum is σ = 31048875314240. Its totient is φ = 13970347162560.

The previous prime is 22121020000889. The next prime is 22121020001023. The reversal of 22121020001001 is 10010002012122.

It is not a de Polignac number, because 22121020001001 - 2¹⁰ = 22121019999977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121020001051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10459210 + ... + 12395043.

It is an arithmetic number, because the mean of its divisors is an integer number (1940554707140).

Almost surely, 2^{22121020001001} is an apocalyptic number.

It is an amenable number.

22121020001001 is a deficient number, since it is larger than the sum of its proper divisors (8927855313239).

22121020001001 is a wasteful number, since it uses less digits than its factorization.

22121020001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22871256.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22121020001001 its reverse (10010002012122), we get a palindrome (32131022013123).

The spelling of 22121020001001 in words is "twenty-two trillion, one hundred twenty-one billion, twenty million, one thousand, one".