1610222364221 has 4 divisors (see below), whose sum is σ = 1613715254844. Its totient is φ = 1606729473600.

The previous prime is 1610222364133. The next prime is 1610222364227. The reversal of 1610222364221 is 1224632220161.

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 391713256900 + 1218509107321 = 625870^2 + 1103861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1610222364221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610222364227) 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, 1746444620 + ... + 1746445541.

It is an arithmetic number, because the mean of its divisors is an integer number (403428813711).

Almost surely, 2^{1610222364221} is an apocalyptic number.

It is an amenable number.

1610222364221 is a deficient number, since it is larger than the sum of its proper divisors (3492890623).

1610222364221 is an equidigital number, since it uses as much as digits as its factorization.

1610222364221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492890622.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 1610222364221 its reverse (1224632220161), we get a palindrome (2834854584382).

The spelling of 1610222364221 in words is "one trillion, six hundred ten billion, two hundred twenty-two million, three hundred sixty-four thousand, two hundred twenty-one".