10021111212 has 96 divisors (see below), whose sum is σ = 27613200384. Its totient is φ = 2767982400.

The previous prime is 10021111187. The next prime is 10021111249. The reversal of 10021111212 is 21211112001.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 4746037 + ... + 4748147.

It is an arithmetic number, because the mean of its divisors is an integer number (287637504).

Almost surely, 2^10021111212 is an apocalyptic number.

10021111212 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 10021111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13806600192).

10021111212 is an abundant number, since it is smaller than the sum of its proper divisors (17592089172).

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

10021111212 is a wasteful number, since it uses less digits than its factorization.

10021111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979 (or 3977 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10021111212 its reverse (21211112001), we get a palindrome (31232223213).

The spelling of 10021111212 in words is "ten billion, twenty-one million, one hundred eleven thousand, two hundred twelve".