1021133423 has 4 divisors (see below), whose sum is σ = 1027896048. Its totient is φ = 1014370800.

The previous prime is 1021133419. The next prime is 1021133489. The reversal of 1021133423 is 3243311201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3243311201 = 13 ⋅249485477.

It is a cyclic number.

It is not a de Polignac number, because 1021133423 - 2² = 1021133419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021133395 and 1021133404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021133923) 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, 3381086 + ... + 3381387.

It is an arithmetic number, because the mean of its divisors is an integer number (256974012).

Almost surely, 2^1021133423 is an apocalyptic number.

1021133423 is a deficient number, since it is larger than the sum of its proper divisors (6762625).

1021133423 is an equidigital number, since it uses as much as digits as its factorization.

1021133423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762624.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1021133423 is about 31955.1783440493. The cubic root of 1021133423 is about 1006.9954242634.

Adding to 1021133423 its reverse (3243311201), we get a palindrome (4264444624).

It can be divided in two parts, 10211 and 33423, that added together give a palindrome (43634).

The spelling of 1021133423 in words is "one billion, twenty-one million, one hundred thirty-three thousand, four hundred twenty-three".