1211201112212 has 96 divisors (see below), whose sum is σ = 2636497543680. Its totient is φ = 474085301760.

The previous prime is 1211201112203. The next prime is 1211201112217. The reversal of 1211201112212 is 2122111021121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201112217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12932489 + ... + 13025807.

It is an arithmetic number, because the mean of its divisors is an integer number (27463516080).

Almost surely, 2^{1211201112212} 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 1211201112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1318248771840).

1211201112212 is an abundant number, since it is smaller than the sum of its proper divisors (1425296431468).

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

1211201112212 is a wasteful number, since it uses less digits than its factorization.

1211201112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93721 (or 93719 counting only the distinct ones).

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

Adding to 1211201112212 its reverse (2122111021121), we get a palindrome (3333312133333).

The spelling of 1211201112212 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred twelve thousand, two hundred twelve".