1021200010112 has 64 divisors (see below), whose sum is σ = 2042269165440. Its totient is φ = 508632791040.

The previous prime is 1021200010109. The next prime is 1021200010123. The reversal of 1021200010112 is 2110100021201.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1021200010093 and 1021200010102.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63574562 + ... + 63590622.

It is an arithmetic number, because the mean of its divisors is an integer number (31910455710).

Almost surely, 2^{1021200010112} is an apocalyptic number.

It is an amenable number.

1021200010112 is a deficient number, since it is larger than the sum of its proper divisors (1021069155328).

1021200010112 is a wasteful number, since it uses less digits than its factorization.

1021200010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17959 (or 17947 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021200010112 its reverse (2110100021201), we get a palindrome (3131300031313).

The spelling of 1021200010112 in words is "one trillion, twenty-one billion, two hundred million, ten thousand, one hundred twelve".