1123213030021 has 8 divisors (see below), whose sum is σ = 1141725350744. Its totient is φ = 1104703902720.

The previous prime is 1123213030007. The next prime is 1123213030117. The reversal of 1123213030021 is 1200303123211.

It can be written as a sum of positive squares in 4 ways, for example, as 21951681921 + 1101261348100 = 148161^2 + 1049410^2 .

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 1123213030021 - 2⁷ = 1123213029893 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 (1123213030721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83880 + ... + 1501153.

It is an arithmetic number, because the mean of its divisors is an integer number (142715668843).

Almost surely, 2^{1123213030021} is an apocalyptic number.

It is an amenable number.

1123213030021 is a deficient number, since it is larger than the sum of its proper divisors (18512320723).

1123213030021 is a wasteful number, since it uses less digits than its factorization.

1123213030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596711.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1123213030021 its reverse (1200303123211), we get a palindrome (2323516153232).

The spelling of 1123213030021 in words is "one trillion, one hundred twenty-three billion, two hundred thirteen million, thirty thousand, twenty-one".