201002112123 has 4 divisors (see below), whose sum is σ = 268002816168. Its totient is φ = 134001408080.

The previous prime is 201002112109. The next prime is 201002112137. The reversal of 201002112123 is 321211200102.

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

It is an interprime number because it is at equal distance from previous prime (201002112109) and next prime (201002112137).

It is a cyclic number.

It is not a de Polignac number, because 201002112123 - 2¹⁷ = 201001981051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201002112023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33500352018 + ... + 33500352023.

It is an arithmetic number, because the mean of its divisors is an integer number (67000704042).

Almost surely, 2^201002112123 is an apocalyptic number.

201002112123 is a deficient number, since it is larger than the sum of its proper divisors (67000704045).

201002112123 is an equidigital number, since it uses as much as digits as its factorization.

201002112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67000704044.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 201002112123 its reverse (321211200102), we get a palindrome (522213312225).

The spelling of 201002112123 in words is "two hundred one billion, two million, one hundred twelve thousand, one hundred twenty-three".