1021020000012 has 48 divisors (see below), whose sum is σ = 2654000455680. Its totient is φ = 339451370064.

The previous prime is 1021020000001. The next prime is 1021020000029. The reversal of 1021020000012 is 2100000201201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1021019999949 and 1021020000003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12300528 + ... + 12383255.

It is an arithmetic number, because the mean of its divisors is an integer number (55291676160).

Almost surely, 2^{1021020000012} is an apocalyptic number.

1021020000012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021020000012 is an abundant number, since it is smaller than the sum of its proper divisors (1632980455668).

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

1021020000012 is a wasteful number, since it uses less digits than its factorization.

1021020000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24684179 (or 24684171 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1021020000012 its reverse (2100000201201), we get a palindrome (3121020201213).

The spelling of 1021020000012 in words is "one trillion, twenty-one billion, twenty million, twelve", and thus it is an aban number and an uban number.