1311011220212 has 12 divisors (see below), whose sum is σ = 2294460257796. Its totient is φ = 655451146560.

The previous prime is 1311011220149. The next prime is 1311011220283. The reversal of 1311011220212 is 2120221101131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 291161684836 + 1019849535376 = 539594^2 + 1009876^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13561703 + ... + 13658030.

It is an arithmetic number, because the mean of its divisors is an integer number (191205021483).

Almost surely, 2^{1311011220212} is an apocalyptic number.

It is an amenable number.

1311011220212 is a deficient number, since it is larger than the sum of its proper divisors (983449037584).

1311011220212 is a wasteful number, since it uses less digits than its factorization.

1311011220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27231778 (or 27231776 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1311011220212 its reverse (2120221101131), we get a palindrome (3431232321343).

The spelling of 1311011220212 in words is "one trillion, three hundred eleven billion, eleven million, two hundred twenty thousand, two hundred twelve".