123212500145533 has 4 divisors (see below), whose sum is σ = 123459418984000. Its totient is φ = 122965581307068.

The previous prime is 123212500145507. The next prime is 123212500145569. The reversal of 123212500145533 is 335541005212321.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 123212500145533 - 2¹³ = 123212500137341 is a prime.

It is a super-2 number, since 2×123212500145533² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123212500145492 and 123212500145501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212500145593) 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, 123459418485 + ... + 123459419482.

It is an arithmetic number, because the mean of its divisors is an integer number (30864854746000).

Almost surely, 2^{123212500145533} is an apocalyptic number.

It is an amenable number.

123212500145533 is a deficient number, since it is larger than the sum of its proper divisors (246918838467).

123212500145533 is an equidigital number, since it uses as much as digits as its factorization.

123212500145533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246918838466.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 123212500145533 its reverse (335541005212321), we get a palindrome (458753505357854).

The spelling of 123212500145533 in words is "one hundred twenty-three trillion, two hundred twelve billion, five hundred million, one hundred forty-five thousand, five hundred thirty-three".