1021210018 has 8 divisors (see below), whose sum is σ = 1532944620. Its totient is φ = 510228480.

The previous prime is 1021210013. The next prime is 1021210037. The reversal of 1021210018 is 8100121201.

It can be written as a sum of positive squares in 2 ways, for example, as 991431169 + 29778849 = 31487^2 + 5457^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1021209983 and 1021210010.

It is not an unprimeable number, because it can be changed into a prime (1021210013) 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, 184863 + ... + 190306.

Almost surely, 2^1021210018 is an apocalyptic number.

1021210018 is a deficient number, since it is larger than the sum of its proper divisors (511734602).

1021210018 is a wasteful number, since it uses less digits than its factorization.

1021210018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376532.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 1021210018 is about 31956.3767971277. The cubic root of 1021210018 is about 1007.0206018045.

Adding to 1021210018 its reverse (8100121201), we get a palindrome (9121331219).

The spelling of 1021210018 in words is "one billion, twenty-one million, two hundred ten thousand, eighteen".