1021104020321 has 48 divisors (see below), whose sum is σ = 1350678967680. Its totient is φ = 753532243200.

The previous prime is 1021104020281. The next prime is 1021104020327. The reversal of 1021104020321 is 1230204011201.

It is not a de Polignac number, because 1021104020321 - 2¹⁴ = 1021104003937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021104020321.

It is not an unprimeable number, because it can be changed into a prime (1021104020327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56590061 + ... + 56608101.

It is an arithmetic number, because the mean of its divisors is an integer number (28139145160).

Almost surely, 2^{1021104020321} is an apocalyptic number.

1021104020321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021104020321 is a deficient number, since it is larger than the sum of its proper divisors (329574947359).

1021104020321 is a wasteful number, since it uses less digits than its factorization.

1021104020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21606 (or 21595 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1021104020321 its reverse (1230204011201), we get a palindrome (2251308031522).

The spelling of 1021104020321 in words is "one trillion, twenty-one billion, one hundred four million, twenty thousand, three hundred twenty-one".