10021212108 has 36 divisors (see below), whose sum is σ = 26269599720. Its totient is φ = 3340403712.

The previous prime is 10021212101. The next prime is 10021212119. The reversal of 10021212108 is 80121212001.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×10021212108² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10021212101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5153973 + ... + 5155916.

Almost surely, 2^10021212108 is an apocalyptic number.

10021212108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

10021212108 is an abundant number, since it is smaller than the sum of its proper divisors (16248387612).

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

10021212108 is a wasteful number, since it uses less digits than its factorization.

10021212108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10309908 (or 10309894 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10021212108 its reverse (80121212001), we get a palindrome (90142424109).

The spelling of 10021212108 in words is "ten billion, twenty-one million, two hundred twelve thousand, one hundred eight".