212103115125 has 128 divisors (see below), whose sum is σ = 400869001728. Its totient is φ = 98682624000.

The previous prime is 212103115121. The next prime is 212103115129. The reversal of 212103115125 is 521511301212.

It is an interprime number because it is at equal distance from previous prime (212103115121) and next prime (212103115129).

It is not a de Polignac number, because 212103115125 - 2² = 212103115121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212103115095 and 212103115104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212103115121) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11132107 + ... + 11151143.

It is an arithmetic number, because the mean of its divisors is an integer number (3131789076).

Almost surely, 2^212103115125 is an apocalyptic number.

212103115125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212103115125 is a deficient number, since it is larger than the sum of its proper divisors (188765886603).

212103115125 is a wasteful number, since it uses less digits than its factorization.

212103115125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19176 (or 19166 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 212103115125 its reverse (521511301212), we get a palindrome (733614416337).

The spelling of 212103115125 in words is "two hundred twelve billion, one hundred three million, one hundred fifteen thousand, one hundred twenty-five".