221310203012 has 12 divisors (see below), whose sum is σ = 410074788060. Its totient is φ = 104145977856.

The previous prime is 221310203003. The next prime is 221310203033. The reversal of 221310203012 is 210302013122.

It can be written as a sum of positive squares in 2 ways, for example, as 76891962436 + 144418240576 = 277294^2 + 380024^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627280837 + ... + 1627280972.

It is an arithmetic number, because the mean of its divisors is an integer number (34172899005).

Almost surely, 2^221310203012 is an apocalyptic number.

It is an amenable number.

221310203012 is a deficient number, since it is larger than the sum of its proper divisors (188764585048).

221310203012 is a wasteful number, since it uses less digits than its factorization.

221310203012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254561830 (or 3254561828 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221310203012 its reverse (210302013122), we get a palindrome (431612216134).

The spelling of 221310203012 in words is "two hundred twenty-one billion, three hundred ten million, two hundred three thousand, twelve".