1021211111112 has 64 divisors (see below), whose sum is σ = 2567651650560. Its totient is φ = 338455603200.

The previous prime is 1021211111087. The next prime is 1021211111113. The reversal of 1021211111112 is 2111111121201.

It is a junction number, because it is equal to n+sod(n) for n = 1021211111091 and 1021211111100.

It is not an unprimeable number, because it can be changed into a prime (1021211111113) by changing a digit.

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, 9485778 + ... + 9592830.

It is an arithmetic number, because the mean of its divisors is an integer number (40119557040).

Almost surely, 2^{1021211111112} is an apocalyptic number.

1021211111112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021211111112 is an abundant number, since it is smaller than the sum of its proper divisors (1546440539448).

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

1021211111112 is a wasteful number, since it uses less digits than its factorization.

1021211111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109334 (or 109330 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1021211111112 its reverse (2111111121201), we get a palindrome (3132322232313).

The spelling of 1021211111112 in words is "one trillion, twenty-one billion, two hundred eleven million, one hundred eleven thousand, one hundred twelve".