20001210203221 has 8 divisors (see below), whose sum is σ = 21598456296704. Its totient is φ = 18412348604400.

The previous prime is 20001210203209. The next prime is 20001210203243. The reversal of 20001210203221 is 12230201210002.

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 20001210203221 - 2⁹ = 20001210202709 is a prime.

It is a super-2 number, since 2×20001210203221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001210203195 and 20001210203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001210203251) 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, 2096118705 + ... + 2096128246.

It is an arithmetic number, because the mean of its divisors is an integer number (2699807037088).

Almost surely, 2^{20001210203221} is an apocalyptic number.

It is an amenable number.

20001210203221 is a deficient number, since it is larger than the sum of its proper divisors (1597246093483).

20001210203221 is a wasteful number, since it uses less digits than its factorization.

20001210203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192247331.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20001210203221 its reverse (12230201210002), we get a palindrome (32231411413223).

The spelling of 20001210203221 in words is "twenty trillion, one billion, two hundred ten million, two hundred three thousand, two hundred twenty-one".