2100122525 has 12 divisors (see below), whose sum is σ = 2717376672. Its totient is φ = 1607049840.

The previous prime is 2100122513. The next prime is 2100122639. The reversal of 2100122525 is 5252210012.

It is a happy number.

It is not a de Polignac number, because 2100122525 - 2¹⁸ = 2099860381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100122497 and 2100122506.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1825619 + ... + 1826768.

It is an arithmetic number, because the mean of its divisors is an integer number (226448056).

Almost surely, 2^2100122525 is an apocalyptic number.

2100122525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2100122525 is a deficient number, since it is larger than the sum of its proper divisors (617254147).

2100122525 is a wasteful number, since it uses less digits than its factorization.

2100122525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652420 (or 3652415 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2100122525 is about 45827.0937874092. The cubic root of 2100122525 is about 1280.6040697352.

Adding to 2100122525 its reverse (5252210012), we get a palindrome (7352332537).

The spelling of 2100122525 in words is "two billion, one hundred million, one hundred twenty-two thousand, five hundred twenty-five".