10021021212 has 24 divisors (see below), whose sum is σ = 24757817616. Its totient is φ = 3143849728.

The previous prime is 10021021187. The next prime is 10021021217. The reversal of 10021021212 is 21212012001.

It is a super-2 number, since 2×10021021212² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021021217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24561123 + ... + 24561530.

It is an arithmetic number, because the mean of its divisors is an integer number (1031575734).

Almost surely, 2^10021021212 is an apocalyptic number.

10021021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10021021212 is an abundant number, since it is smaller than the sum of its proper divisors (14736796404).

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

10021021212 is a wasteful number, since it uses less digits than its factorization.

10021021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49122677 (or 49122675 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10021021212 its reverse (21212012001), we get a palindrome (31233033213).

The spelling of 10021021212 in words is "ten billion, twenty-one million, twenty-one thousand, two hundred twelve".