1021200120112 has 10 divisors (see below), whose sum is σ = 1978575232748. Its totient is φ = 510600060048.

The previous prime is 1021200120089. The next prime is 1021200120173. The reversal of 1021200120112 is 2110210021201.

It is a junction number, because it is equal to n+sod(n) for n = 1021200120092 and 1021200120101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31912503738 + ... + 31912503769.

Almost surely, 2^{1021200120112} is an apocalyptic number.

It is an amenable number.

1021200120112 is a deficient number, since it is larger than the sum of its proper divisors (957375112636).

1021200120112 is an equidigital number, since it uses as much as digits as its factorization.

1021200120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63825007515 (or 63825007509 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021200120112 its reverse (2110210021201), we get a palindrome (3131410141313).

The spelling of 1021200120112 in words is "one trillion, twenty-one billion, two hundred million, one hundred twenty thousand, one hundred twelve".