20000201211221 has 64 divisors (see below), whose sum is σ = 25212905871360. Its totient is φ = 15540308784000.

The previous prime is 20000201211163. The next prime is 20000201211229. The reversal of 20000201211221 is 12211210200002.

It is not a de Polignac number, because 20000201211221 - 2¹⁸ = 20000200949077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000201211196 and 20000201211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000201211229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9178613510 + ... + 9178615688.

It is an arithmetic number, because the mean of its divisors is an integer number (393951654240).

Almost surely, 2^{20000201211221} is an apocalyptic number.

It is an amenable number.

20000201211221 is a deficient number, since it is larger than the sum of its proper divisors (5212704660139).

20000201211221 is a wasteful number, since it uses less digits than its factorization.

20000201211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4567 (or 4545 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20000201211221 its reverse (12211210200002), we get a palindrome (32211411411223).

The spelling of 20000201211221 in words is "twenty trillion, two hundred one million, two hundred eleven thousand, two hundred twenty-one".