101021020002 has 96 divisors (see below), whose sum is σ = 254617084800. Its totient is φ = 28348291584.

The previous prime is 101021019989. The next prime is 101021020091. The reversal of 101021020002 is 200020120101.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9130858 + ... + 9141914.

It is an arithmetic number, because the mean of its divisors is an integer number (2652261300).

Almost surely, 2^101021020002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101021020002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127308542400).

101021020002 is an abundant number, since it is smaller than the sum of its proper divisors (153596064798).

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

101021020002 is a wasteful number, since it uses less digits than its factorization.

101021020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12360 (or 12357 counting only the distinct ones).

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

Adding to 101021020002 its reverse (200020120101), we get a palindrome (301041140103).

The spelling of 101021020002 in words is "one hundred one billion, twenty-one million, twenty thousand, two".