189120222121 has 8 divisors (see below), whose sum is σ = 190325850624. Its totient is φ = 187916838480.

The previous prime is 189120222113. The next prime is 189120222127. The reversal of 189120222121 is 121222021981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189120222121 - 2³ = 189120222113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189120222127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392026 + ... + 729331.

It is an arithmetic number, because the mean of its divisors is an integer number (23790731328).

Almost surely, 2^189120222121 is an apocalyptic number.

It is an amenable number.

189120222121 is a deficient number, since it is larger than the sum of its proper divisors (1205628503).

189120222121 is a wasteful number, since it uses less digits than its factorization.

189120222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122431.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 189120222121 in words is "one hundred eighty-nine billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".