2100554155125 has 48 divisors (see below), whose sum is σ = 4009340108592. Its totient is φ = 1054395801600.

The previous prime is 2100554155109. The next prime is 2100554155127. The reversal of 2100554155125 is 5215514550012.

2100554155125 is a `hidden beast` number, since 2 + 10 + 0 + 55 + 41 + 551 + 2 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 394254642609 + 1706299512516 = 627897^2 + 1306254^2 .

It is not a de Polignac number, because 2100554155125 - 2⁴ = 2100554155109 is a prime.

It is a super-2 number, since 2×2100554155125² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2100554155125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100554155127) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 54897324 + ... + 54935573.

It is an arithmetic number, because the mean of its divisors is an integer number (83527918929).

Almost surely, 2^{2100554155125} is an apocalyptic number.

2100554155125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2100554155125 is a deficient number, since it is larger than the sum of its proper divisors (1908785953467).

2100554155125 is a wasteful number, since it uses less digits than its factorization.

2100554155125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109832935 (or 109832922 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 36.

The spelling of 2100554155125 in words is "two trillion, one hundred billion, five hundred fifty-four million, one hundred fifty-five thousand, one hundred twenty-five".