10000100121221 has 16 divisors (see below), whose sum is σ = 11625778783488. Its totient is φ = 8423930275200.

The previous prime is 10000100121203. The next prime is 10000100121269. The reversal of 10000100121221 is 12212100100001.

It is a cyclic number.

It is not a de Polignac number, because 10000100121221 - 2²² = 10000095926917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000100124221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9305945 + ... + 10324766.

It is an arithmetic number, because the mean of its divisors is an integer number (726611173968).

Almost surely, 2^{10000100121221} is an apocalyptic number.

It is an amenable number.

10000100121221 is a deficient number, since it is larger than the sum of its proper divisors (1625678662267).

10000100121221 is a wasteful number, since it uses less digits than its factorization.

10000100121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19631972.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10000100121221 its reverse (12212100100001), we get a palindrome (22212200221222).

The spelling of 10000100121221 in words is "ten trillion, one hundred million, one hundred twenty-one thousand, two hundred twenty-one".