20210122200221 has 8 divisors (see below), whose sum is σ = 21195873033984. Its totient is φ = 19233292188880.

The previous prime is 20210122200211. The next prime is 20210122200241. The reversal of 20210122200221 is 12200222101202.

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 not a de Polignac number, because 20210122200221 - 2⁶ = 20210122200157 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 20210122200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210122200211) 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, 2230200965 + ... + 2230210026.

It is an arithmetic number, because the mean of its divisors is an integer number (2649484129248).

Almost surely, 2^{20210122200221} is an apocalyptic number.

It is an amenable number.

20210122200221 is a deficient number, since it is larger than the sum of its proper divisors (985750833763).

20210122200221 is a wasteful number, since it uses less digits than its factorization.

20210122200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460411211.

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

Adding to 20210122200221 its reverse (12200222101202), we get a palindrome (32410344301423).

The spelling of 20210122200221 in words is "twenty trillion, two hundred ten billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-one".