1212020200018 has 8 divisors (see below), whose sum is σ = 1822703900940. Its totient is φ = 604452233040.

The previous prime is 1212020199989. The next prime is 1212020200049. The reversal of 1212020200018 is 8100020202121.

It can be written as a sum of positive squares in 2 ways, for example, as 1188869664609 + 23150535409 = 1090353^2 + 152153^2 .

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 = 1212020199968 and 1212020200004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778932513 + ... + 778934068.

Almost surely, 2^{1212020200018} is an apocalyptic number.

1212020200018 is a deficient number, since it is larger than the sum of its proper divisors (610683700922).

1212020200018 is a wasteful number, since it uses less digits than its factorization.

1212020200018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557866972.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212020200018 its reverse (8100020202121), we get a palindrome (9312040402139).

The spelling of 1212020200018 in words is "one trillion, two hundred twelve billion, twenty million, two hundred thousand, eighteen".