222201021202018 has 4 divisors (see below), whose sum is σ = 333301531803030. Its totient is φ = 111100510601008.

The previous prime is 222201021201989. The next prime is 222201021202019. The reversal of 222201021202018 is 810202120102222.

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., 211774470415729 + 10426550786289 = 14552473^2 + 3229017^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222201021201983 and 222201021202001.

It is not an unprimeable number, because it can be changed into a prime (222201021202019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550255300503 + ... + 55550255300506.

Almost surely, 2^{222201021202018} is an apocalyptic number.

222201021202018 is a deficient number, since it is larger than the sum of its proper divisors (111100510601012).

222201021202018 is a wasteful number, since it uses less digits than its factorization.

222201021202018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111100510601011.

The product of its (nonzero) digits is 1024, while the sum is 25.

The spelling of 222201021202018 in words is "two hundred twenty-two trillion, two hundred one billion, twenty-one million, two hundred two thousand, eighteen".