1211212211202 has 128 divisors (see below), whose sum is σ = 3103684024320. Its totient is φ = 342963840960.

The previous prime is 1211212211191. The next prime is 1211212211203. The reversal of 1211212211202 is 2021122121121.

1211212211202 is a `hidden beast` number, since 121 + 121 + 221 + 1 + 202 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1211212211203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38261593 + ... + 38293235.

It is an arithmetic number, because the mean of its divisors is an integer number (24247531440).

Almost surely, 2^{1211212211202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211212211202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1551842012160).

1211212211202 is an abundant number, since it is smaller than the sum of its proper divisors (1892471813118).

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

1211212211202 is a wasteful number, since it uses less digits than its factorization.

1211212211202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32565 (or 32559 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211212211202 its reverse (2021122121121), we get a palindrome (3232334332323).

The spelling of 1211212211202 in words is "one trillion, two hundred eleven billion, two hundred twelve million, two hundred eleven thousand, two hundred two".