20011203311221 has 8 divisors (see below), whose sum is σ = 20077601820480. Its totient is φ = 19944903537888.

The previous prime is 20011203311207. The next prime is 20011203311237. The reversal of 20011203311221 is 12211330211002.

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 20011203311221 - 2⁵ = 20011203311189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011203311251) 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, 24277951 + ... + 25088668.

It is an arithmetic number, because the mean of its divisors is an integer number (2509700227560).

Almost surely, 2^{20011203311221} is an apocalyptic number.

It is an amenable number.

20011203311221 is a deficient number, since it is larger than the sum of its proper divisors (66398509259).

20011203311221 is an equidigital number, since it uses as much as digits as its factorization.

20011203311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49367963.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20011203311221 its reverse (12211330211002), we get a palindrome (32222533522223).

The spelling of 20011203311221 in words is "twenty trillion, eleven billion, two hundred three million, three hundred eleven thousand, two hundred twenty-one".