10000001221212 has 96 divisors (see below), whose sum is σ = 25301444519680. Its totient is φ = 3063263132160.

The previous prime is 10000001221211. The next prime is 10000001221213. The reversal of 10000001221212 is 21212210000001.

It is an interprime number because it is at equal distance from previous prime (10000001221211) and next prime (10000001221213).

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 (10000001221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1001688 + ... + 4582944.

Almost surely, 2^{10000001221212} is an apocalyptic number.

10000001221212 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 10000001221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12650722259840).

10000001221212 is an abundant number, since it is smaller than the sum of its proper divisors (15301443298468).

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

10000001221212 is a wasteful number, since it uses less digits than its factorization.

10000001221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581651 (or 3581649 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10000001221212 its reverse (21212210000001), we get a palindrome (31212211221213).

The spelling of 10000001221212 in words is "ten trillion, one million, two hundred twenty-one thousand, two hundred twelve".