1211212210112 has 56 divisors (see below), whose sum is σ = 2434284346560. Its totient is φ = 597851504640.

The previous prime is 1211212210111. The next prime is 1211212210129. The reversal of 1211212210112 is 2110122121121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211212210111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45698048 + ... + 45724544.

Almost surely, 2^{1211212210112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211212210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217142173280).

1211212210112 is an abundant number, since it is smaller than the sum of its proper divisors (1223072136448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211212210112 is an equidigital number, since it uses as much as digits as its factorization.

1211212210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35629 (or 35619 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1211212210112 its reverse (2110122121121), we get a palindrome (3321334331233).

The spelling of 1211212210112 in words is "one trillion, two hundred eleven billion, two hundred twelve million, two hundred ten thousand, one hundred twelve".