1123203123021 has 8 divisors (see below), whose sum is σ = 1711547616064. Its totient is φ = 641830356000.

The previous prime is 1123203123019. The next prime is 1123203123073. The reversal of 1123203123021 is 1203213023211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1123203123021 - 2¹ = 1123203123019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 53485863001 = 1123203123021 / (1 + 1 + 2 + 3 + 2 + 0 + 3 + 1 + 2 + 3 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123203123421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26742931480 + ... + 26742931521.

It is an arithmetic number, because the mean of its divisors is an integer number (213943452008).

Almost surely, 2^{1123203123021} is an apocalyptic number.

It is an amenable number.

1123203123021 is a deficient number, since it is larger than the sum of its proper divisors (588344493043).

1123203123021 is an equidigital number, since it uses as much as digits as its factorization.

1123203123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53485863011.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1123203123021 its reverse (1203213023211), we get a palindrome (2326416146232).

The spelling of 1123203123021 in words is "one trillion, one hundred twenty-three billion, two hundred three million, one hundred twenty-three thousand, twenty-one".