12212145125 has 32 divisors (see below), whose sum is σ = 15927335424. Its totient is φ = 9339288000.

The previous prime is 12212145073. The next prime is 12212145133. The reversal of 12212145125 is 52154121221.

It is a happy number.

It is not a de Polignac number, because 12212145125 - 2⁶ = 12212145061 is a prime.

It is a super-2 number, since 2×12212145125² (a number of 21 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 = 12212145094 and 12212145103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228455 + ... + 276795.

It is an arithmetic number, because the mean of its divisors is an integer number (497729232).

Almost surely, 2^12212145125 is an apocalyptic number.

It is an amenable number.

12212145125 is a deficient number, since it is larger than the sum of its proper divisors (3715190299).

12212145125 is an equidigital number, since it uses as much as digits as its factorization.

12212145125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48446 (or 48436 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

Adding to 12212145125 its reverse (52154121221), we get a palindrome (64366266346).

The spelling of 12212145125 in words is "twelve billion, two hundred twelve million, one hundred forty-five thousand, one hundred twenty-five".