102021002001020 has 48 divisors (see below), whose sum is σ = 214312706012160. Its totient is φ = 40795335034944.

The previous prime is 102021002000999. The next prime is 102021002001089. The reversal of 102021002001020 is 20100200120201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102021002000992 and 102021002001010.

It is a congruent number.

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, 2465028767 + ... + 2465070153.

It is an arithmetic number, because the mean of its divisors is an integer number (4464848041920).

Almost surely, 2^{102021002001020} is an apocalyptic number.

102021002001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021002001020 is an abundant number, since it is smaller than the sum of its proper divisors (112291704011140).

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

102021002001020 is a wasteful number, since it uses less digits than its factorization.

102021002001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77882 (or 77880 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102021002001020 its reverse (20100200120201), we get a palindrome (122121202121221).

The spelling of 102021002001020 in words is "one hundred two trillion, twenty-one billion, two million, one thousand, twenty".