100021000212 has 144 divisors (see below), whose sum is σ = 297307221120. Its totient is φ = 27753705216.

The previous prime is 100021000193. The next prime is 100021000223. The reversal of 100021000212 is 212000120001.

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

It is a junction number, because it is equal to n+sod(n) for n = 100021000194 and 100021000203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5183839 + ... + 5203097.

It is an arithmetic number, because the mean of its divisors is an integer number (2064633480).

Almost surely, 2^100021000212 is an apocalyptic number.

100021000212 is a gapful number since it is divisible by the number (12) 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 100021000212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148653610560).

100021000212 is an abundant number, since it is smaller than the sum of its proper divisors (197286220908).

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

100021000212 is a wasteful number, since it uses less digits than its factorization.

100021000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19870 (or 19865 counting only the distinct ones).

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

Adding to 100021000212 its reverse (212000120001), we get a palindrome (312021120213).

The spelling of 100021000212 in words is "one hundred billion, twenty-one million, two hundred twelve", and thus it is an aban number.