133121611656023 has 4 divisors (see below), whose sum is σ = 136217463089928. Its totient is φ = 130025760222120.

The previous prime is 133121611656001. The next prime is 133121611656067. The reversal of 133121611656023 is 320656116121331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133121611656023 - 2¹² = 133121611651927 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 (133121611656923) 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, 1547925716888 + ... + 1547925716973.

It is an arithmetic number, because the mean of its divisors is an integer number (34054365772482).

Almost surely, 2^{133121611656023} is an apocalyptic number.

133121611656023 is a deficient number, since it is larger than the sum of its proper divisors (3095851433905).

133121611656023 is an equidigital number, since it uses as much as digits as its factorization.

133121611656023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095851433904.

The product of its (nonzero) digits is 116640, while the sum is 41.

Adding to 133121611656023 its reverse (320656116121331), we get a palindrome (453777727777354).

The spelling of 133121611656023 in words is "one hundred thirty-three trillion, one hundred twenty-one billion, six hundred eleven million, six hundred fifty-six thousand, twenty-three".