10001212101220 has 48 divisors (see below), whose sum is σ = 21264849865728. Its totient is φ = 3950564092160.

The previous prime is 10001212101211. The next prime is 10001212101259. The reversal of 10001212101220 is 2210121210001.

It is a super-3 number, since 3×10001212101220³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10001212101220.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2501565 + ... + 5124475.

It is an arithmetic number, because the mean of its divisors is an integer number (443017705536).

Almost surely, 2^{10001212101220} is an apocalyptic number.

10001212101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001212101220 is an abundant number, since it is smaller than the sum of its proper divisors (11263637764508).

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

10001212101220 is a wasteful number, since it uses less digits than its factorization.

10001212101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625300 (or 2625298 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10001212101220 its reverse (2210121210001), we get a palindrome (12211333311221).

The spelling of 10001212101220 in words is "ten trillion, one billion, two hundred twelve million, one hundred one thousand, two hundred twenty".