1201211211212 has 6 divisors (see below), whose sum is σ = 2102119619628. Its totient is φ = 600605605604.

The previous prime is 1201211211197. The next prime is 1201211211241. The reversal of 1201211211212 is 2121121121021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150151401398 + ... + 150151401405.

It is an arithmetic number, because the mean of its divisors is an integer number (350353269938).

Almost surely, 2^{1201211211212} is an apocalyptic number.

It is an amenable number.

1201211211212 is a deficient number, since it is larger than the sum of its proper divisors (900908408416).

1201211211212 is a wasteful number, since it uses less digits than its factorization.

1201211211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300302802807 (or 300302802805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1201211211212 its reverse (2121121121021), we get a palindrome (3322332332233).

The spelling of 1201211211212 in words is "one trillion, two hundred one billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".