1201221012010 has 48 divisors (see below), whose sum is σ = 2297823552504. Its totient is φ = 452036164608.

The previous prime is 1201221011927. The next prime is 1201221012011. The reversal of 1201221012010 is 102101221021.

It can be written as a sum of positive squares in 12 ways, for example, as 333877108041 + 867343903969 = 577821^2 + 931313^2 .

It is not an unprimeable number, because it can be changed into a prime (1201221012011) 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 23 ways as a sum of consecutive naturals, for example, 6957652 + ... + 7128208.

Almost surely, 2^{1201221012010} is an apocalyptic number.

1201221012010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201221012010 is a deficient number, since it is larger than the sum of its proper divisors (1096602540494).

1201221012010 is a wasteful number, since it uses less digits than its factorization.

1201221012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173035 (or 173018 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201221012010 its reverse (102101221021), we get a palindrome (1303322233031).

The spelling of 1201221012010 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twelve thousand, ten".