18010111201202 has 4 divisors (see below), whose sum is σ = 27015166801806. Its totient is φ = 9005055600600.

The previous prime is 18010111201193. The next prime is 18010111201217. The reversal of 18010111201202 is 20210211101081.

It is a happy number.

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., 16011113929321 + 1998997271881 = 4001389^2 + 1413859^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4502527800299 + ... + 4502527800302.

Almost surely, 2^{18010111201202} is an apocalyptic number.

18010111201202 is a deficient number, since it is larger than the sum of its proper divisors (9005055600604).

18010111201202 is an equidigital number, since it uses as much as digits as its factorization.

18010111201202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9005055600603.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 18010111201202 its reverse (20210211101081), we get a palindrome (38220322302283).

The spelling of 18010111201202 in words is "eighteen trillion, ten billion, one hundred eleven million, two hundred one thousand, two hundred two".