1211120212 has 6 divisors (see below), whose sum is σ = 2119460378. Its totient is φ = 605560104.

The previous prime is 1211120203. The next prime is 1211120213. The reversal of 1211120212 is 2120211121.

It can be written as a sum of positive squares in only one way, i.e., 739622416 + 471497796 = 27196^2 + 21714^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1211120192 and 1211120201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211120213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151390023 + ... + 151390030.

Almost surely, 2^1211120212 is an apocalyptic number.

It is an amenable number.

1211120212 is a deficient number, since it is larger than the sum of its proper divisors (908340166).

1211120212 is a wasteful number, since it uses less digits than its factorization.

1211120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302780057 (or 302780055 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211120212 is about 34801.1524521818. The cubic root of 1211120212 is about 1065.9309784273.

Adding to 1211120212 its reverse (2120211121), we get a palindrome (3331331333).

Subtracting 1211120212 from its reverse (2120211121), we obtain a palindrome (909090909).

It can be divided in two parts, 12111 and 20212, that added together give a palindrome (32323).

The spelling of 1211120212 in words is "one billion, two hundred eleven million, one hundred twenty thousand, two hundred twelve".