20221221122001 has 24 divisors (see below), whose sum is σ = 29330148646656. Its totient is φ = 13424673753600.

The previous prime is 20221221121999. The next prime is 20221221122017. The reversal of 20221221122001 is 10022112212202.

It is a happy number.

20221221122001 is a `hidden beast` number, since 2 + 0 + 221 + 221 + 1 + 220 + 0 + 1 = 666.

It is not a de Polignac number, because 20221221122001 - 2¹ = 20221221121999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20221221122801) 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, 4964776 + ... + 8067926.

It is an arithmetic number, because the mean of its divisors is an integer number (1222089526944).

Almost surely, 2^{20221221122001} is an apocalyptic number.

It is an amenable number.

20221221122001 is a deficient number, since it is larger than the sum of its proper divisors (9108927524655).

20221221122001 is a wasteful number, since it uses less digits than its factorization.

20221221122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106173 (or 3106170 counting only the distinct ones).

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

Adding to 20221221122001 its reverse (10022112212202), we get a palindrome (30243333334203).

The spelling of 20221221122001 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, one".