1311221331030 has 32 divisors (see below), whose sum is σ = 3389002825824. Its totient is φ = 322762173696.

The previous prime is 1311221331023. The next prime is 1311221331137. The reversal of 1311221331030 is 301331221131.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1311221330988 and 1311221331006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1681052599 + ... + 1681053378.

It is an arithmetic number, because the mean of its divisors is an integer number (105906338307).

Almost surely, 2^{1311221331030} is an apocalyptic number.

1311221331030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311221331030 is an abundant number, since it is smaller than the sum of its proper divisors (2077781494794).

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

1311221331030 is a wasteful number, since it uses less digits than its factorization.

1311221331030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362106000.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1311221331030 its reverse (301331221131), we get a palindrome (1612552552161).

The spelling of 1311221331030 in words is "one trillion, three hundred eleven billion, two hundred twenty-one million, three hundred thirty-one thousand, thirty".