1210013201221 has 12 divisors (see below), whose sum is σ = 1330083604332. Its totient is φ = 1099954856000.

The previous prime is 1210013201219. The next prime is 1210013201231. The reversal of 1210013201221 is 1221023100121.

It can be written as a sum of positive squares in 2 ways, for example, as 22294670596 + 1187718530625 = 149314^2 + 1089825^2 .

It is not a de Polignac number, because 1210013201221 - 2¹ = 1210013201219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210013201195 and 1210013201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210013201231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2172801 + ... + 2672281.

It is an arithmetic number, because the mean of its divisors is an integer number (110840300361).

Almost surely, 2^{1210013201221} is an apocalyptic number.

1210013201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210013201221 is a deficient number, since it is larger than the sum of its proper divisors (120070403111).

1210013201221 is a wasteful number, since it uses less digits than its factorization.

1210013201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519524 (or 519513 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1210013201221 its reverse (1221023100121), we get a palindrome (2431036301342).

The spelling of 1210013201221 in words is "one trillion, two hundred ten billion, thirteen million, two hundred one thousand, two hundred twenty-one".