1201221221012 has 24 divisors (see below), whose sum is σ = 2104375684320. Its totient is φ = 599971168160.

The previous prime is 1201221220897. The next prime is 1201221221021. The reversal of 1201221221012 is 2101221221021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56260523 + ... + 56281869.

It is an arithmetic number, because the mean of its divisors is an integer number (87682320180).

Almost surely, 2^{1201221221012} is an apocalyptic number.

It is an amenable number.

1201221221012 is a deficient number, since it is larger than the sum of its proper divisors (903154463308).

1201221221012 is a wasteful number, since it uses less digits than its factorization.

1201221221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35671 (or 35669 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1201221221012 its reverse (2101221221021), we get a palindrome (3302442442033).

Subtracting 1201221221012 from its reverse (2101221221021), we obtain a palindrome (900000000009).

The spelling of 1201221221012 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, twelve".