1021013121112 has 8 divisors (see below), whose sum is σ = 1914399602100. Its totient is φ = 510506560552.

The previous prime is 1021013121101. The next prime is 1021013121119. The reversal of 1021013121112 is 2111213101201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021013121119) 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 as a sum of consecutive naturals, namely, 63813320062 + ... + 63813320077.

Almost surely, 2^{1021013121112} is an apocalyptic number.

It is an amenable number.

1021013121112 is a deficient number, since it is larger than the sum of its proper divisors (893386480988).

1021013121112 is a wasteful number, since it uses less digits than its factorization.

1021013121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127626640145 (or 127626640141 counting only the distinct ones).

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

Adding to 1021013121112 its reverse (2111213101201), we get a palindrome (3132226222313).

The spelling of 1021013121112 in words is "one trillion, twenty-one billion, thirteen million, one hundred twenty-one thousand, one hundred twelve".