123451172229 has 16 divisors (see below), whose sum is σ = 205217533440. Its totient is φ = 64130478960.

The previous prime is 123451172189. The next prime is 123451172231. The reversal of 123451172229 is 922271154321.

It is not a de Polignac number, because 123451172229 - 2⁹ = 123451171717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123451172269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267210099 + ... + 267210560.

It is an arithmetic number, because the mean of its divisors is an integer number (12826095840).

Almost surely, 2^123451172229 is an apocalyptic number.

It is an amenable number.

123451172229 is a deficient number, since it is larger than the sum of its proper divisors (81766361211).

123451172229 is a wasteful number, since it uses less digits than its factorization.

123451172229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534420680.

The product of its digits is 60480, while the sum is 39.

The spelling of 123451172229 in words is "one hundred twenty-three billion, four hundred fifty-one million, one hundred seventy-two thousand, two hundred twenty-nine".