125512101 has 24 divisors (see below), whose sum is σ = 212992416. Its totient is φ = 70215840.

The previous prime is 125512091. The next prime is 125512147. The reversal of 125512101 is 101215521.

125512101 is a `hidden beast` number, since 12 + 551 + 2 + 101 = 666.

It is not a de Polignac number, because 125512101 - 2¹⁰ = 125511077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125512181) 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, 47475 + ... + 50048.

It is an arithmetic number, because the mean of its divisors is an integer number (8874684).

Almost surely, 2^125512101 is an apocalyptic number.

125512101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125512101 is a deficient number, since it is larger than the sum of its proper divisors (87480315).

125512101 is a wasteful number, since it uses less digits than its factorization.

125512101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97553 (or 97550 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 125512101 is about 11203.2183322472. The cubic root of 125512101 is about 500.6818710145.

Adding to 125512101 its reverse (101215521), we get a palindrome (226727622).

The spelling of 125512101 in words is "one hundred twenty-five million, five hundred twelve thousand, one hundred one".