1031020013221 has 8 divisors (see below), whose sum is σ = 1163533557600. Its totient is φ = 904970544240.

The previous prime is 1031020013209. The next prime is 1031020013249. The reversal of 1031020013221 is 1223100201301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1031020013221 - 2⁹ = 1031020012709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031020013195 and 1031020013204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031020013021) 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 7 ways as a sum of consecutive naturals, for example, 1616018511 + ... + 1616019148.

It is an arithmetic number, because the mean of its divisors is an integer number (145441694700).

Almost surely, 2^{1031020013221} is an apocalyptic number.

1031020013221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1031020013221 is a deficient number, since it is larger than the sum of its proper divisors (132513544379).

1031020013221 is a wasteful number, since it uses less digits than its factorization.

1031020013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232037699.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1031020013221 its reverse (1223100201301), we get a palindrome (2254120214522).

The spelling of 1031020013221 in words is "one trillion, thirty-one billion, twenty million, thirteen thousand, two hundred twenty-one".