101220002000 has 160 divisors (see below), whose sum is σ = 264429887904. Its totient is φ = 37252608000.

The previous prime is 101220001969. The next prime is 101220002003. The reversal of 101220002000 is 200022101.

It can be written as a sum of positive squares in 16 ways, for example, as 91491730576 + 9728271424 = 302476^2 + 98632^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101220002003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8235860 + ... + 8248140.

Almost surely, 2^101220002000 is an apocalyptic number.

101220002000 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 101220002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132214943952).

101220002000 is an abundant number, since it is smaller than the sum of its proper divisors (163209885904).

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

101220002000 is a wasteful number, since it uses less digits than its factorization.

101220002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12634 (or 12618 counting only the distinct ones).

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

Adding to 101220002000 its reverse (200022101), we get a palindrome (101420024101).

The spelling of 101220002000 in words is "one hundred one billion, two hundred twenty million, two thousand".