1211023020312 has 64 divisors (see below), whose sum is σ = 3844517529600. Its totient is φ = 346006576800.

The previous prime is 1211023020293. The next prime is 1211023020323. The reversal of 1211023020312 is 2130203201121.

1211023020312 is a `hidden beast` number, since 12 + 110 + 230 + 2 + 0 + 312 = 666.

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

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, 400469064 + ... + 400472087.

It is an arithmetic number, because the mean of its divisors is an integer number (60070586400).

Almost surely, 2^{1211023020312} is an apocalyptic number.

1211023020312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211023020312 is an abundant number, since it is smaller than the sum of its proper divisors (2633494509288).

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

1211023020312 is a wasteful number, since it uses less digits than its factorization.

1211023020312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800941173 (or 800941163 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1211023020312 its reverse (2130203201121), we get a palindrome (3341226221433).

The spelling of 1211023020312 in words is "one trillion, two hundred eleven billion, twenty-three million, twenty thousand, three hundred twelve".