22121102221001 has 48 divisors (see below), whose sum is σ = 27614889418752. Its totient is φ = 17317718520960.

The previous prime is 22121102220983. The next prime is 22121102221021. The reversal of 22121102221001 is 10012220112122.

It is not a de Polignac number, because 22121102221001 - 2⁶ = 22121102220937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121102221021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11850596 + ... + 13589658.

It is an arithmetic number, because the mean of its divisors is an integer number (575310196224).

Almost surely, 2^{22121102221001} is an apocalyptic number.

It is an amenable number.

22121102221001 is a deficient number, since it is larger than the sum of its proper divisors (5493787197751).

22121102221001 is a wasteful number, since it uses less digits than its factorization.

22121102221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739222 (or 1739181 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22121102221001 its reverse (10012220112122), we get a palindrome (32133322333123).

The spelling of 22121102221001 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, one".