1021220220218 has 8 divisors (see below), whose sum is σ = 1671087633120. Its totient is φ = 464191009180.

The previous prime is 1021220220211. The next prime is 1021220220257. The reversal of 1021220220218 is 8120220221201.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021220220193 and 1021220220202.

It is not an unprimeable number, because it can be changed into a prime (1021220220211) 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, 23209550438 + ... + 23209550481.

It is an arithmetic number, because the mean of its divisors is an integer number (208885954140).

Almost surely, 2^{1021220220218} is an apocalyptic number.

1021220220218 is a deficient number, since it is larger than the sum of its proper divisors (649867412902).

1021220220218 is a wasteful number, since it uses less digits than its factorization.

1021220220218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46419100932.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 1021220220218 its reverse (8120220221201), we get a palindrome (9141440441419).

The spelling of 1021220220218 in words is "one trillion, twenty-one billion, two hundred twenty million, two hundred twenty thousand, two hundred eighteen".