2179242802125 has 224 divisors, whose sum is σ = 4184397270144. Its totient is φ = 1132243142400.

The previous prime is 2179242802123. The next prime is 2179242802151. The reversal of 2179242802125 is 5212082429712.

2179242802125 is a `hidden beast` number, since 2 + 1 + 7 + 9 + 2 + 428 + 0 + 212 + 5 = 666.

It is not a de Polignac number, because 2179242802125 - 2¹ = 2179242802123 is a prime.

It is a super-2 number, since 2×2179242802125² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179242802123) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 552124402 + ... + 552128348.

It is an arithmetic number, because the mean of its divisors is an integer number (18680344956).

Almost surely, 2^{2179242802125} is an apocalyptic number.

2179242802125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2179242802125 is a deficient number, since it is larger than the sum of its proper divisors (2005154468019).

2179242802125 is an frugal number, since it uses more digits than its factorization.

2179242802125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136 (or 4111 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 2179242802125 in words is "two trillion, one hundred seventy-nine billion, two hundred forty-two million, eight hundred two thousand, one hundred twenty-five".