189215430122 has 4 divisors (see below), whose sum is σ = 283823145186. Its totient is φ = 94607715060.

The previous prime is 189215430109. The next prime is 189215430137. The reversal of 189215430122 is 221034512981.

189215430122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 434989²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 189215430121 + 1 = 434989^2 + 1^2 .

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 as a sum of consecutive naturals, namely, 47303857529 + ... + 47303857532.

Almost surely, 2^189215430122 is an apocalyptic number.

189215430122 is a deficient number, since it is larger than the sum of its proper divisors (94607715064).

189215430122 is an equidigital number, since it uses as much as digits as its factorization.

189215430122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94607715063.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 189215430122 in words is "one hundred eighty-nine billion, two hundred fifteen million, four hundred thirty thousand, one hundred twenty-two".