1020123133 has 4 divisors (see below), whose sum is σ = 1023205408. Its totient is φ = 1017040860.

The previous prime is 1020123121. The next prime is 1020123151. The reversal of 1020123133 is 3313210201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3313210201 = 7 ⋅473315743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020123133 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 (1020123113) 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, 1540641 + ... + 1541302.

It is an arithmetic number, because the mean of its divisors is an integer number (255801352).

Almost surely, 2^1020123133 is an apocalyptic number.

It is an amenable number.

1020123133 is a deficient number, since it is larger than the sum of its proper divisors (3082275).

1020123133 is an equidigital number, since it uses as much as digits as its factorization.

1020123133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082274.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1020123133 is about 31939.3665090590. The cubic root of 1020123133 is about 1006.6632139676.

Adding to 1020123133 its reverse (3313210201), we get a palindrome (4333333334).

The spelling of 1020123133 in words is "one billion, twenty million, one hundred twenty-three thousand, one hundred thirty-three".