1321221030212 has 6 divisors (see below), whose sum is σ = 2312136802878. Its totient is φ = 660610515104.

The previous prime is 1321221030137. The next prime is 1321221030247. The reversal of 1321221030212 is 2120301221231.

It can be written as a sum of positive squares in only one way, i.e., 1048670210116 + 272550820096 = 1024046^2 + 522064^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165152628773 + ... + 165152628780.

It is an arithmetic number, because the mean of its divisors is an integer number (385356133813).

Almost surely, 2^{1321221030212} is an apocalyptic number.

It is an amenable number.

1321221030212 is a deficient number, since it is larger than the sum of its proper divisors (990915772666).

1321221030212 is a wasteful number, since it uses less digits than its factorization.

1321221030212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330305257557 (or 330305257555 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1321221030212 its reverse (2120301221231), we get a palindrome (3441522251443).

The spelling of 1321221030212 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-one million, thirty thousand, two hundred twelve".