10010001111221 has 2 divisors, whose sum is σ = 10010001111222. Its totient is φ = 10010001111220.

The previous prime is 10010001111211. The next prime is 10010001111293. The reversal of 10010001111221 is 12211110001001.

10010001111221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9530464251025 + 479536860196 = 3087145^2 + 692486^2 .

It is an emirp because it is prime and its reverse (12211110001001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10010001111221 - 2³⁴ = 9992821242037 is a prime.

It is a super-2 number, since 2×10010001111221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10010001111211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005000555610 + 5005000555611.

It is an arithmetic number, because the mean of its divisors is an integer number (5005000555611).

Almost surely, 2^{10010001111221} is an apocalyptic number.

It is an amenable number.

10010001111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010001111221 is an equidigital number, since it uses as much as digits as its factorization.

10010001111221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10010001111221 its reverse (12211110001001), we get a palindrome (22221111112222).

The spelling of 10010001111221 in words is "ten trillion, ten billion, one million, one hundred eleven thousand, two hundred twenty-one".