1023113120021 has 2 divisors, whose sum is σ = 1023113120022. Its totient is φ = 1023113120020.

The previous prime is 1023113119999. The next prime is 1023113120063. The reversal of 1023113120021 is 1200213113201.

1023113120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 953134353796 + 69978766225 = 976286^2 + 264535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023113120021 - 2⁶ = 1023113119957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023113120621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511556560010 + 511556560011.

It is an arithmetic number, because the mean of its divisors is an integer number (511556560011).

Almost surely, 2^{1023113120021} is an apocalyptic number.

It is an amenable number.

1023113120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023113120021 is an equidigital number, since it uses as much as digits as its factorization.

1023113120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1023113120021 its reverse (1200213113201), we get a palindrome (2223326233222).

The spelling of 1023113120021 in words is "one trillion, twenty-three billion, one hundred thirteen million, one hundred twenty thousand, twenty-one".