1212021110112 has 24 divisors (see below), whose sum is σ = 3181555414296. Its totient is φ = 404007036672.

The previous prime is 1212021110101. The next prime is 1212021110119. The reversal of 1212021110112 is 2110111202121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 1212021110091 and 1212021110100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212021110119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6312609853 + ... + 6312610044.

It is an arithmetic number, because the mean of its divisors is an integer number (132564808929).

Almost surely, 2^{1212021110112} is an apocalyptic number.

1212021110112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212021110112 is an abundant number, since it is smaller than the sum of its proper divisors (1969534304184).

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

1212021110112 is a wasteful number, since it uses less digits than its factorization.

1212021110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12625219910 (or 12625219902 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212021110112 its reverse (2110111202121), we get a palindrome (3322132312233).

The spelling of 1212021110112 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred ten thousand, one hundred twelve".