2203020312221 has 4 divisors (see below), whose sum is σ = 2206025797692. Its totient is φ = 2200014826752.

The previous prime is 2203020312173. The next prime is 2203020312239. The reversal of 2203020312221 is 1222130203022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1850171244100 + 352849068121 = 1360210^2 + 594011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2203020312221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2203020312193 and 2203020312202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2203020312121) 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, 1502741636 + ... + 1502743101.

It is an arithmetic number, because the mean of its divisors is an integer number (551506449423).

Almost surely, 2^{2203020312221} is an apocalyptic number.

It is an amenable number.

2203020312221 is a deficient number, since it is larger than the sum of its proper divisors (3005485471).

2203020312221 is an equidigital number, since it uses as much as digits as its factorization.

2203020312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005485470.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 2203020312221 its reverse (1222130203022), we get a palindrome (3425150515243).

The spelling of 2203020312221 in words is "two trillion, two hundred three billion, twenty million, three hundred twelve thousand, two hundred twenty-one".