1201221031144 has 32 divisors (see below), whose sum is σ = 2253897306720. Its totient is φ = 600181914816.

The previous prime is 1201221031123. The next prime is 1201221031147. The reversal of 1201221031144 is 4411301221021.

It is not an unprimeable number, because it can be changed into a prime (1201221031147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88143259 + ... + 88156885.

It is an arithmetic number, because the mean of its divisors is an integer number (70434290835).

Almost surely, 2^{1201221031144} is an apocalyptic number.

It is an amenable number.

1201221031144 is a deficient number, since it is larger than the sum of its proper divisors (1052676275576).

1201221031144 is a wasteful number, since it uses less digits than its factorization.

1201221031144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20689 (or 20685 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 1201221031144 its reverse (4411301221021), we get a palindrome (5612522252165).

The spelling of 1201221031144 in words is "one trillion, two hundred one billion, two hundred twenty-one million, thirty-one thousand, one hundred forty-four".