1021011321013 has 4 divisors (see below), whose sum is σ = 1021013341920. Its totient is φ = 1021009300108.

The previous prime is 1021011320981. The next prime is 1021011321017. The reversal of 1021011321013 is 3101231101201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1021011321013 - 2⁵ = 1021011320981 is a prime.

It is a super-2 number, since 2×1021011321013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021011321017) 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 3 ways as a sum of consecutive naturals, for example, 502248 + ... + 1514686.

It is an arithmetic number, because the mean of its divisors is an integer number (255253335480).

Almost surely, 2^{1021011321013} is an apocalyptic number.

It is an amenable number.

1021011321013 is a deficient number, since it is larger than the sum of its proper divisors (2020907).

1021011321013 is a wasteful number, since it uses less digits than its factorization.

1021011321013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020906.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1021011321013 its reverse (3101231101201), we get a palindrome (4122242422214).

The spelling of 1021011321013 in words is "one trillion, twenty-one billion, eleven million, three hundred twenty-one thousand, thirteen".