133212120123 has 24 divisors (see below), whose sum is σ = 187645932048. Its totient is φ = 84048902208.

The previous prime is 133212120089. The next prime is 133212120131. The reversal of 133212120123 is 321021212331.

It is not a de Polignac number, because 133212120123 - 2³⁶ = 64492643387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133212120123.

It is not an unprimeable number, because it can be changed into a prime (133212120193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1018065 + ... + 1141437.

It is an arithmetic number, because the mean of its divisors is an integer number (7818580502).

Almost surely, 2^133212120123 is an apocalyptic number.

133212120123 is a deficient number, since it is larger than the sum of its proper divisors (54433811925).

133212120123 is a wasteful number, since it uses less digits than its factorization.

133212120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124411 (or 124392 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 133212120123 its reverse (321021212331), we get a palindrome (454233332454).

The spelling of 133212120123 in words is "one hundred thirty-three billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-three".