1123121101031 has 4 divisors (see below), whose sum is σ = 1123174207272. Its totient is φ = 1123067994792.

The previous prime is 1123121101021. The next prime is 1123121101087. The reversal of 1123121101031 is 1301011213211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123121101031 - 2¹⁸ = 1123120838887 is a prime.

It is a super-2 number, since 2×1123121101031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123121101021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26521385 + ... + 26563698.

It is an arithmetic number, because the mean of its divisors is an integer number (280793551818).

Almost surely, 2^{1123121101031} is an apocalyptic number.

1123121101031 is a deficient number, since it is larger than the sum of its proper divisors (53106241).

1123121101031 is an equidigital number, since it uses as much as digits as its factorization.

1123121101031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53106240.

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

Adding to 1123121101031 its reverse (1301011213211), we get a palindrome (2424132314242).

The spelling of 1123121101031 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-one million, one hundred one thousand, thirty-one".