10001212200021 has 96 divisors (see below), whose sum is σ = 16201489669248. Its totient is φ = 5466327068160.

The previous prime is 10001212200013. The next prime is 10001212200041. The reversal of 10001212200021 is 12000221210001.

It is not a de Polignac number, because 10001212200021 - 2³ = 10001212200013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001212200041) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 681134946 + ... + 681149628.

It is an arithmetic number, because the mean of its divisors is an integer number (168765517388).

Almost surely, 2^{10001212200021} is an apocalyptic number.

It is an amenable number.

10001212200021 is a deficient number, since it is larger than the sum of its proper divisors (6200277469227).

10001212200021 is a wasteful number, since it uses less digits than its factorization.

10001212200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16851 (or 16844 counting only the distinct ones).

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

Adding to 10001212200021 its reverse (12000221210001), we get a palindrome (22001433410022).

The spelling of 10001212200021 in words is "ten trillion, one billion, two hundred twelve million, two hundred thousand, twenty-one".