1211111210012 has 12 divisors (see below), whose sum is σ = 2312121401016. Its totient is φ = 550505095440.

The previous prime is 1211111210009. The next prime is 1211111210021. The reversal of 1211111210012 is 2100121111121.

It is a congruent number.

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, 13762627343 + ... + 13762627430.

It is an arithmetic number, because the mean of its divisors is an integer number (192676783418).

Almost surely, 2^{1211111210012} is an apocalyptic number.

It is an amenable number.

1211111210012 is a deficient number, since it is larger than the sum of its proper divisors (1101010191004).

1211111210012 is a wasteful number, since it uses less digits than its factorization.

1211111210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27525254788 (or 27525254786 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211111210012 its reverse (2100121111121), we get a palindrome (3311232321133).

The spelling of 1211111210012 in words is "one trillion, two hundred eleven billion, one hundred eleven million, two hundred ten thousand, twelve".