102125561045 has 4 divisors (see below), whose sum is σ = 122550673260. Its totient is φ = 81700448832.

The previous prime is 102125561029. The next prime is 102125561071. The reversal of 102125561045 is 540165521201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35921241841 + 66204319204 = 189529^2 + 257302^2 .

It is a cyclic number.

It is not a de Polignac number, because 102125561045 - 2⁴ = 102125561029 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 10212556100 + ... + 10212556109.

It is an arithmetic number, because the mean of its divisors is an integer number (30637668315).

Almost surely, 2^102125561045 is an apocalyptic number.

It is an amenable number.

102125561045 is a deficient number, since it is larger than the sum of its proper divisors (20425112215).

102125561045 is an equidigital number, since it uses as much as digits as its factorization.

102125561045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20425112214.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 102125561045 in words is "one hundred two billion, one hundred twenty-five million, five hundred sixty-one thousand, forty-five".