101210021000 has 128 divisors (see below), whose sum is σ = 258532560000. Its totient is φ = 36779296000.

The previous prime is 101210020993. The next prime is 101210021089. The reversal of 101210021000 is 120012101.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30677351 + ... + 30680649.

It is an arithmetic number, because the mean of its divisors is an integer number (2019785625).

Almost surely, 2^101210021000 is an apocalyptic number.

101210021000 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 101210021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129266280000).

101210021000 is an abundant number, since it is smaller than the sum of its proper divisors (157322539000).

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

101210021000 is a wasteful number, since it uses less digits than its factorization.

101210021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120 (or 6106 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 101210021000 its reverse (120012101), we get a palindrome (101330033101).

The spelling of 101210021000 in words is "one hundred one billion, two hundred ten million, twenty-one thousand".