84211100125 has 16 divisors (see below), whose sum is σ = 111277541232. Its totient is φ = 63406003200.

The previous prime is 84211100027. The next prime is 84211100153. The reversal of 84211100125 is 52100111248.

It can be written as a sum of positive squares in 8 ways, for example, as 25688716729 + 58522383396 = 160277^2 + 241914^2 .

It is not a de Polignac number, because 84211100125 - 2²¹ = 84209002973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84211100125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19812252 + ... + 19816501.

It is an arithmetic number, because the mean of its divisors is an integer number (6954846327).

Almost surely, 2^84211100125 is an apocalyptic number.

84211100125 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

84211100125 is a deficient number, since it is larger than the sum of its proper divisors (27066441107).

84211100125 is a wasteful number, since it uses less digits than its factorization.

84211100125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39628785 (or 39628775 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The spelling of 84211100125 in words is "eighty-four billion, two hundred eleven million, one hundred thousand, one hundred twenty-five".