20100120220221 has 8 divisors (see below), whose sum is σ = 26801392515264. Its totient is φ = 13399464036000.

The previous prime is 20100120220211. The next prime is 20100120220231. The reversal of 20100120220221 is 12202202100102.

It is an interprime number because it is at equal distance from previous prime (20100120220211) and next prime (20100120220231).

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

It is not a de Polignac number, because 20100120220221 - 2⁷ = 20100120220093 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20100120220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100120220211) 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, 153951576 + ... + 154082081.

It is an arithmetic number, because the mean of its divisors is an integer number (3350174064408).

Almost surely, 2^{20100120220221} is an apocalyptic number.

It is an amenable number.

20100120220221 is a deficient number, since it is larger than the sum of its proper divisors (6701272295043).

20100120220221 is a wasteful number, since it uses less digits than its factorization.

20100120220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308055411.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20100120220221 its reverse (12202202100102), we get a palindrome (32302322320323).

The spelling of 20100120220221 in words is "twenty trillion, one hundred billion, one hundred twenty million, two hundred twenty thousand, two hundred twenty-one".