133112021 has 4 divisors (see below), whose sum is σ = 152128032. Its totient is φ = 114096012.

The previous prime is 133112011. The next prime is 133112029. The reversal of 133112021 is 120211331.

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: 120211331 = 181 ⋅664151.

It is a cyclic number.

It is not a de Polignac number, because 133112021 - 2¹⁰ = 133110997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133111987 and 133112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133112029) 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, 9507995 + ... + 9508008.

It is an arithmetic number, because the mean of its divisors is an integer number (38032008).

Almost surely, 2^133112021 is an apocalyptic number.

It is an amenable number.

133112021 is a deficient number, since it is larger than the sum of its proper divisors (19016011).

133112021 is an equidigital number, since it uses as much as digits as its factorization.

133112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19016010.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 133112021 is about 11537.4182987356. The cubic root of 133112021 is about 510.5901421822.

Adding to 133112021 its reverse (120211331), we get a palindrome (253323352).

It can be divided in two parts, 1331 and 12021, that multiplied together give a palindrome (15999951).

The spelling of 133112021 in words is "one hundred thirty-three million, one hundred twelve thousand, twenty-one".