1311221102202 has 192 divisors, whose sum is σ = 3440554790400. Its totient is φ = 370045298880.

The previous prime is 1311221102201. The next prime is 1311221102203. The reversal of 1311221102202 is 2022011221131.

1311221102202 is a `hidden beast` number, since 1 + 311 + 22 + 110 + 220 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1311221102201) and next prime (1311221102203).

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 (1311221102201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5883468 + ... + 6102264.

It is an arithmetic number, because the mean of its divisors is an integer number (17919556200).

Almost surely, 2^{1311221102202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311221102202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720277395200).

1311221102202 is an abundant number, since it is smaller than the sum of its proper divisors (2129333688198).

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

1311221102202 is a wasteful number, since it uses less digits than its factorization.

1311221102202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218903 (or 218891 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1311221102202 its reverse (2022011221131), we get a palindrome (3333232323333).

The spelling of 1311221102202 in words is "one trillion, three hundred eleven billion, two hundred twenty-one million, one hundred two thousand, two hundred two".