1021100321144 has 64 divisors (see below), whose sum is σ = 1951400678400. Its totient is φ = 500805244800.

The previous prime is 1021100321099. The next prime is 1021100321221. The reversal of 1021100321144 is 4411230011201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121137122 + ... + 121145550.

It is an arithmetic number, because the mean of its divisors is an integer number (30490635600).

Almost surely, 2^{1021100321144} is an apocalyptic number.

It is an amenable number.

1021100321144 is a deficient number, since it is larger than the sum of its proper divisors (930300357256).

1021100321144 is a wasteful number, since it uses less digits than its factorization.

1021100321144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9564 (or 9560 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1021100321144 its reverse (4411230011201), we get a palindrome (5432330332345).

The spelling of 1021100321144 in words is "one trillion, twenty-one billion, one hundred million, three hundred twenty-one thousand, one hundred forty-four".