1311211121022 has 48 divisors (see below), whose sum is σ = 3182989176432. Its totient is φ = 386597871360.

The previous prime is 1311211120993. The next prime is 1311211121057. The reversal of 1311211121022 is 2201211121131.

It is a happy number.

1311211121022 is a `hidden beast` number, since 1 + 311 + 211 + 121 + 0 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1311211120986 and 1311211121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89482923 + ... + 89497574.

It is an arithmetic number, because the mean of its divisors is an integer number (66312274509).

Almost surely, 2^{1311211121022} is an apocalyptic number.

1311211121022 is an abundant number, since it is smaller than the sum of its proper divisors (1871778055410).

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

1311211121022 is a wasteful number, since it uses less digits than its factorization.

1311211121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178980553 (or 178980550 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1311211121022 its reverse (2201211121131), we get a palindrome (3512422242153).

The spelling of 1311211121022 in words is "one trillion, three hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, twenty-two".