1011211212112 has 10 divisors (see below), whose sum is σ = 1959221723498. Its totient is φ = 505605606048.

The previous prime is 1011211212091. The next prime is 1011211212119. The reversal of 1011211212112 is 2112121121101.

It can be written as a sum of positive squares in only one way, i.e., 669739277376 + 341471934736 = 818376^2 + 584356^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 63200700757 = 1011211212112 / (1 + 0 + 1 + 1 + 2 + 1 + 1 + 2 + 1 + 2 + 1 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211212119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31600350363 + ... + 31600350394.

Almost surely, 2^{1011211212112} is an apocalyptic number.

It is an amenable number.

1011211212112 is a deficient number, since it is larger than the sum of its proper divisors (948010511386).

1011211212112 is an equidigital number, since it uses as much as digits as its factorization.

1011211212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63200700765 (or 63200700759 counting only the distinct ones).

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

Adding to 1011211212112 its reverse (2112121121101), we get a palindrome (3123332333213).

The spelling of 1011211212112 in words is "one trillion, eleven billion, two hundred eleven million, two hundred twelve thousand, one hundred twelve".