10121212112 has 80 divisors (see below), whose sum is σ = 22286698560. Its totient is φ = 4412083200.

The previous prime is 10121212099. The next prime is 10121212139. The reversal of 10121212112 is 21121212101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413858 + ... + 437630.

It is an arithmetic number, because the mean of its divisors is an integer number (278583732).

Almost surely, 2^10121212112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10121212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11143349280).

10121212112 is an abundant number, since it is smaller than the sum of its proper divisors (12165486448).

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

10121212112 is a wasteful number, since it uses less digits than its factorization.

10121212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23892 (or 23886 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10121212112 its reverse (21121212101), we get a palindrome (31242424213).

The spelling of 10121212112 in words is "ten billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twelve".