20100301221 has 96 divisors (see below), whose sum is σ = 36703352448. Its totient is φ = 9618255360.

The previous prime is 20100301219. The next prime is 20100301231. The reversal of 20100301221 is 12210300102.

It is not a de Polignac number, because 20100301221 - 2¹ = 20100301219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20100301197 and 20100301206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100301231) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16248615 + ... + 16249851.

It is an arithmetic number, because the mean of its divisors is an integer number (382326588).

Almost surely, 2^20100301221 is an apocalyptic number.

20100301221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20100301221 is a deficient number, since it is larger than the sum of its proper divisors (16603051227).

20100301221 is a wasteful number, since it uses less digits than its factorization.

20100301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20100301221 its reverse (12210300102), we get a palindrome (32310601323).

The spelling of 20100301221 in words is "twenty billion, one hundred million, three hundred one thousand, two hundred twenty-one".