101020020021000 has 768 divisors, whose sum is σ = 375577916313600. Its totient is φ = 25325879904000.

The previous prime is 101020020020939. The next prime is 101020020021001. The reversal of 101020020021000 is 120020020101.

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

It is not an unprimeable number, because it can be changed into a prime (101020020021001) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 604743489 + ... + 604910511.

It is an arithmetic number, because the mean of its divisors is an integer number (489033745200).

Almost surely, 2^{101020020021000} is an apocalyptic number.

101020020021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101020020021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187788958156800).

101020020021000 is an abundant number, since it is smaller than the sum of its proper divisors (274557896292600).

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

101020020021000 is a wasteful number, since it uses less digits than its factorization.

101020020021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167209 (or 167183 counting only the distinct ones).

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

Adding to 101020020021000 its reverse (120020020101), we get a palindrome (101140040041101).

The spelling of 101020020021000 in words is "one hundred one trillion, twenty billion, twenty million, twenty-one thousand".