2101231252125 has 48 divisors (see below), whose sum is σ = 3788924770800. Its totient is φ = 1120329676800.

The previous prime is 2101231252097. The next prime is 2101231252147. The reversal of 2101231252125 is 5212521321012.

2101231252125 is a `hidden beast` number, since 2 + 1 + 0 + 123 + 12 + 521 + 2 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1289707736409 + 811523515716 = 1135653^2 + 900846^2 .

It is not a de Polignac number, because 2101231252125 - 2⁶ = 2101231252061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3609357 + ... + 4150893.

It is an arithmetic number, because the mean of its divisors is an integer number (78935932725).

Almost surely, 2^{2101231252125} is an apocalyptic number.

2101231252125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2101231252125 is a deficient number, since it is larger than the sum of its proper divisors (1687693518675).

2101231252125 is a wasteful number, since it uses less digits than its factorization.

2101231252125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545007 (or 544994 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 2101231252125 its reverse (5212521321012), we get a palindrome (7313752573137).

The spelling of 2101231252125 in words is "two trillion, one hundred one billion, two hundred thirty-one million, two hundred fifty-two thousand, one hundred twenty-five".