2210203012221 has 14 divisors (see below), whose sum is σ = 3313788605150. Its totient is φ = 1473468674328.

The previous prime is 2210203012219. The next prime is 2210203012223. The reversal of 2210203012221 is 1222103020122.

It is an interprime number because it is at equal distance from previous prime (2210203012219) and next prime (2210203012223).

It can be written as a sum of positive squares in only one way, i.e., 1982072595321 + 228130416900 = 1407861^2 + 477630^2 .

It is not a de Polignac number, because 2210203012221 - 2¹ = 2210203012219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2210203012194 and 2210203012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210203012223) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1515913546 + ... + 1515915003.

Almost surely, 2^{2210203012221} is an apocalyptic number.

It is an amenable number.

2210203012221 is a deficient number, since it is larger than the sum of its proper divisors (1103585592929).

2210203012221 is an frugal number, since it uses more digits than its factorization.

2210203012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031828567 (or 3031828552 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2210203012221 its reverse (1222103020122), we get a palindrome (3432306032343).

The spelling of 2210203012221 in words is "two trillion, two hundred ten billion, two hundred three million, twelve thousand, two hundred twenty-one".