1123423212291 has 16 divisors (see below), whose sum is σ = 1627596733440. Its totient is φ = 686642369760.

The previous prime is 1123423212251. The next prime is 1123423212323. The reversal of 1123423212291 is 1922123243211.

It is a happy number.

It is not a de Polignac number, because 1123423212291 - 2¹⁵ = 1123423179523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123423212251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317888220 + ... + 317891753.

It is an arithmetic number, because the mean of its divisors is an integer number (101724795840).

Almost surely, 2^{1123423212291} is an apocalyptic number.

1123423212291 is a deficient number, since it is larger than the sum of its proper divisors (504173521149).

1123423212291 is a wasteful number, since it uses less digits than its factorization.

1123423212291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635780026.

The product of its digits is 10368, while the sum is 33.

The spelling of 1123423212291 in words is "one trillion, one hundred twenty-three billion, four hundred twenty-three million, two hundred twelve thousand, two hundred ninety-one".