1021013123213 has 16 divisors (see below), whose sum is σ = 1041094925184. Its totient is φ = 1001079889920.

The previous prime is 1021013123131. The next prime is 1021013123261. The reversal of 1021013123213 is 3123213101201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1021013123213 - 2¹⁶ = 1021013057677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021013123113) by changing a digit.

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, 22723856 + ... + 22768742.

It is an arithmetic number, because the mean of its divisors is an integer number (65068432824).

Almost surely, 2^{1021013123213} is an apocalyptic number.

It is an amenable number.

1021013123213 is a deficient number, since it is larger than the sum of its proper divisors (20081801971).

1021013123213 is a wasteful number, since it uses less digits than its factorization.

1021013123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46532.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1021013123213 its reverse (3123213101201), we get a palindrome (4144226224414).

The spelling of 1021013123213 in words is "one trillion, twenty-one billion, thirteen million, one hundred twenty-three thousand, two hundred thirteen".