1211202220112 has 10 divisors (see below), whose sum is σ = 2346704301498. Its totient is φ = 605601110048.

The previous prime is 1211202220087. The next prime is 1211202220117. The reversal of 1211202220112 is 2110222021121.

It can be written as a sum of positive squares in only one way, i.e., 1171710991936 + 39491228176 = 1082456^2 + 198724^2 .

It is a super-3 number, since 3×1211202220112³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211202220117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37850069363 + ... + 37850069394.

Almost surely, 2^{1211202220112} is an apocalyptic number.

It is an amenable number.

1211202220112 is a deficient number, since it is larger than the sum of its proper divisors (1135502081386).

1211202220112 is an equidigital number, since it uses as much as digits as its factorization.

1211202220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75700138765 (or 75700138759 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211202220112 its reverse (2110222021121), we get a palindrome (3321424241233).

The spelling of 1211202220112 in words is "one trillion, two hundred eleven billion, two hundred two million, two hundred twenty thousand, one hundred twelve".