10202121121212 has 144 divisors (see below), whose sum is σ = 28211605007040. Its totient is φ = 3095512160256.

The previous prime is 10202121121207. The next prime is 10202121121243. The reversal of 10202121121212 is 21212112120201.

10202121121212 is a `hidden beast` number, since 10 + 202 + 121 + 121 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2432614 + ... + 5130482.

It is an arithmetic number, because the mean of its divisors is an integer number (195913923660).

Almost surely, 2^{10202121121212} is an apocalyptic number.

10202121121212 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 10202121121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14105802503520).

10202121121212 is an abundant number, since it is smaller than the sum of its proper divisors (18009483885828).

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

10202121121212 is a wasteful number, since it uses less digits than its factorization.

10202121121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698100 (or 2698095 counting only the distinct ones).

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

Adding to 10202121121212 its reverse (21212112120201), we get a palindrome (31414233241413).

The spelling of 10202121121212 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".