133121023 has 4 divisors (see below), whose sum is σ = 152138320. Its totient is φ = 114103728.

The previous prime is 133120997. The next prime is 133121029. The reversal of 133121023 is 320121331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320121331 = 577 ⋅554803.

It is a cyclic number.

It is not a de Polignac number, because 133121023 - 2¹³ = 133112831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133120988 and 133121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133121029) 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, 9508638 + ... + 9508651.

It is an arithmetic number, because the mean of its divisors is an integer number (38034580).

Almost surely, 2^133121023 is an apocalyptic number.

133121023 is a deficient number, since it is larger than the sum of its proper divisors (19017297).

133121023 is an equidigital number, since it uses as much as digits as its factorization.

133121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19017296.

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

The square root of 133121023 is about 11537.8084140793. The cubic root of 133121023 is about 510.6016518585.

Adding to 133121023 its reverse (320121331), we get a palindrome (453242354).

The spelling of 133121023 in words is "one hundred thirty-three million, one hundred twenty-one thousand, twenty-three".