1021120021012 has 24 divisors (see below), whose sum is σ = 2199335430656. Its totient is φ = 403959568608.

The previous prime is 1021120020923. The next prime is 1021120021039. The reversal of 1021120021012 is 2101200211201.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1021120020983 and 1021120021001.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1402637028 + ... + 1402637755.

Almost surely, 2^{1021120021012} is an apocalyptic number.

It is an amenable number.

1021120021012 is an abundant number, since it is smaller than the sum of its proper divisors (1178215409644).

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

1021120021012 is a wasteful number, since it uses less digits than its factorization.

1021120021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805274807 (or 2805274805 counting only the distinct ones).

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

Adding to 1021120021012 its reverse (2101200211201), we get a palindrome (3122320232213).

The spelling of 1021120021012 in words is "one trillion, twenty-one billion, one hundred twenty million, twenty-one thousand, twelve".