1212111011320 has 64 divisors (see below), whose sum is σ = 2976390230400. Its totient is φ = 440588580480.

The previous prime is 1212111011297. The next prime is 1212111011357. The reversal of 1212111011320 is 231101112121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1212111011294 and 1212111011303.

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 15 ways as a sum of consecutive naturals, for example, 527151 + ... + 1643809.

It is an arithmetic number, because the mean of its divisors is an integer number (46506097350).

Almost surely, 2^{1212111011320} is an apocalyptic number.

1212111011320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212111011320 is an abundant number, since it is smaller than the sum of its proper divisors (1764279219080).

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

1212111011320 is a wasteful number, since it uses less digits than its factorization.

1212111011320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119148 (or 1119144 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1212111011320 its reverse (231101112121), we get a palindrome (1443212123441).

The spelling of 1212111011320 in words is "one trillion, two hundred twelve billion, one hundred eleven million, eleven thousand, three hundred twenty".