1211111021212 has 12 divisors (see below), whose sum is σ = 2120649213760. Its totient is φ = 605211245856.

The previous prime is 1211111021171. The next prime is 1211111021227. The reversal of 1211111021212 is 2121201111121.

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, 86058273 + ... + 86072344.

Almost surely, 2^{1211111021212} is an apocalyptic number.

It is an amenable number.

1211111021212 is a deficient number, since it is larger than the sum of its proper divisors (909538192548).

1211111021212 is a wasteful number, since it uses less digits than its factorization.

1211111021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172132380 (or 172132378 counting only the distinct ones).

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

Adding to 1211111021212 its reverse (2121201111121), we get a palindrome (3332312132333).

The spelling of 1211111021212 in words is "one trillion, two hundred eleven billion, one hundred eleven million, twenty-one thousand, two hundred twelve".