10101121212 has 144 divisors (see below), whose sum is σ = 29957609472. Its totient is φ = 2591896320.

The previous prime is 10101121207. The next prime is 10101121213. The reversal of 10101121212 is 21212110101.

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 (10101121213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 515637 + ... + 534867.

Almost surely, 2^10101121212 is an apocalyptic number.

10101121212 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 10101121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14978804736).

10101121212 is an abundant number, since it is smaller than the sum of its proper divisors (19856488260).

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

10101121212 is a wasteful number, since it uses less digits than its factorization.

10101121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19308 (or 19293 counting only the distinct ones).

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

Adding to 10101121212 its reverse (21212110101), we get a palindrome (31313231313).

The spelling of 10101121212 in words is "ten billion, one hundred one million, one hundred twenty-one thousand, two hundred twelve".