1113123101021 has 2 divisors, whose sum is σ = 1113123101022. Its totient is φ = 1113123101020.

The previous prime is 1113123100963. The next prime is 1113123101023. The reversal of 1113123101021 is 1201013213111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846262005625 + 266861095396 = 919925^2 + 516586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113123101021 - 2¹⁴ = 1113123084637 is a prime.

Together with 1113123101023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113123101023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556561550510 + 556561550511.

It is an arithmetic number, because the mean of its divisors is an integer number (556561550511).

Almost surely, 2^{1113123101021} is an apocalyptic number.

It is an amenable number.

1113123101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113123101021 is an equidigital number, since it uses as much as digits as its factorization.

1113123101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1113123101021 its reverse (1201013213111), we get a palindrome (2314136314132).

The spelling of 1113123101021 in words is "one trillion, one hundred thirteen billion, one hundred twenty-three million, one hundred one thousand, twenty-one".