1211122220212 has 12 divisors (see below), whose sum is σ = 2231014616320. Its totient is φ = 573689472696.

The previous prime is 1211122220201. The next prime is 1211122220261. The reversal of 1211122220212 is 2120222211121.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1211122220212.

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, 7967909268 + ... + 7967909419.

Almost surely, 2^{1211122220212} is an apocalyptic number.

It is an amenable number.

1211122220212 is a deficient number, since it is larger than the sum of its proper divisors (1019892396108).

1211122220212 is a wasteful number, since it uses less digits than its factorization.

1211122220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15935818710 (or 15935818708 counting only the distinct ones).

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

Adding to 1211122220212 its reverse (2120222211121), we get a palindrome (3331344431333).

Subtracting 1211122220212 from its reverse (2120222211121), we obtain a palindrome (909099990909).

The spelling of 1211122220212 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twelve".