20200312221 has 4 divisors (see below), whose sum is σ = 26933749632. Its totient is φ = 13466874812.

The previous prime is 20200312201. The next prime is 20200312241. The reversal of 20200312221 is 12221300202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20200312201) and next prime (20200312241).

It is a cyclic number.

It is not a de Polignac number, because 20200312221 - 2¹⁴ = 20200295837 is a prime.

It is a super-2 number, since 2×20200312221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20200312221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200312201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366718701 + ... + 3366718706.

It is an arithmetic number, because the mean of its divisors is an integer number (6733437408).

Almost surely, 2^20200312221 is an apocalyptic number.

It is an amenable number.

20200312221 is a deficient number, since it is larger than the sum of its proper divisors (6733437411).

20200312221 is an equidigital number, since it uses as much as digits as its factorization.

20200312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733437410.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20200312221 its reverse (12221300202), we get a palindrome (32421612423).

The spelling of 20200312221 in words is "twenty billion, two hundred million, three hundred twelve thousand, two hundred twenty-one".