1020001220992 has 64 divisors (see below), whose sum is σ = 2225434755600. Its totient is φ = 462790600704.

The previous prime is 1020001220963. The next prime is 1020001220999. The reversal of 1020001220992 is 2990221000201.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1020001220992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020001220999) 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 7 ways as a sum of consecutive naturals, for example, 5096583 + ... + 5292934.

Almost surely, 2^{1020001220992} is an apocalyptic number.

It is an amenable number.

1020001220992 is an abundant number, since it is smaller than the sum of its proper divisors (1205433534608).

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

1020001220992 is a wasteful number, since it uses less digits than its factorization.

1020001220992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10389603 (or 10389591 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 1020001220992 in words is "one trillion, twenty billion, one million, two hundred twenty thousand, nine hundred ninety-two".