1201221010010 has 64 divisors (see below), whose sum is σ = 2575163059200. Its totient is φ = 403084442880.

The previous prime is 1201221009991. The next prime is 1201221010013. The reversal of 1201221010010 is 100101221021.

It is a junction number, because it is equal to n+sod(n) for n = 1201221009973 and 1201221010000.

It is not an unprimeable number, because it can be changed into a prime (1201221010013) 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 31 ways as a sum of consecutive naturals, for example, 3564431 + ... + 3886850.

It is an arithmetic number, because the mean of its divisors is an integer number (40236922800).

Almost surely, 2^{1201221010010} is an apocalyptic number.

1201221010010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201221010010 is an abundant number, since it is smaller than the sum of its proper divisors (1373942049190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201221010010 is an equidigital number, since it uses as much as digits as its factorization.

1201221010010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451356 (or 7451342 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201221010010 its reverse (100101221021), we get a palindrome (1301322231031).

The spelling of 1201221010010 in words is "one trillion, two hundred one billion, two hundred twenty-one million, ten thousand, ten".