1021020120012 has 24 divisors (see below), whose sum is σ = 2382411124800. Its totient is φ = 340335633616.

The previous prime is 1021020120011. The next prime is 1021020120031. The reversal of 1021020120012 is 2100210201201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1021020120012.

It is not an unprimeable number, because it can be changed into a prime (1021020120011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493939 + ... + 1511957.

It is an arithmetic number, because the mean of its divisors is an integer number (99267130200).

Almost surely, 2^{1021020120012} is an apocalyptic number.

1021020120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021020120012 is an abundant number, since it is smaller than the sum of its proper divisors (1361391004788).

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

1021020120012 is a wasteful number, since it uses less digits than its factorization.

1021020120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101605 (or 1101603 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021020120012 its reverse (2100210201201), we get a palindrome (3121230321213).

The spelling of 1021020120012 in words is "one trillion, twenty-one billion, twenty million, one hundred twenty thousand, twelve".