20221221020201 has 8 divisors (see below), whose sum is σ = 20338471103040. Its totient is φ = 20103975126352.

The previous prime is 20221221020179. The next prime is 20221221020227. The reversal of 20221221020201 is 10202012212202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221221020201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20221221020201.

It is not an unprimeable number, because it can be changed into a prime (20221221020251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8908790 + ... + 10945728.

It is an arithmetic number, because the mean of its divisors is an integer number (2542308887880).

Almost surely, 2^{20221221020201} is an apocalyptic number.

It is an amenable number.

20221221020201 is a deficient number, since it is larger than the sum of its proper divisors (117250082839).

20221221020201 is a wasteful number, since it uses less digits than its factorization.

20221221020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094495.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20221221020201 its reverse (10202012212202), we get a palindrome (30423233232403).

The spelling of 20221221020201 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty thousand, two hundred one".