10000120111221 has 16 divisors (see below), whose sum is σ = 13337964780800. Its totient is φ = 6664511374848.

The previous prime is 10000120111199. The next prime is 10000120111243. The reversal of 10000120111221 is 12211102100001.

It is an interprime number because it is at equal distance from previous prime (10000120111199) and next prime (10000120111243).

It is not a de Polignac number, because 10000120111221 - 2⁹ = 10000120110709 is a prime.

It is a super-2 number, since 2×10000120111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10000120111197 and 10000120111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000120115221) 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, 200752500 + ... + 200802306.

It is an arithmetic number, because the mean of its divisors is an integer number (833622798800).

Almost surely, 2^{10000120111221} is an apocalyptic number.

It is an amenable number.

10000120111221 is a deficient number, since it is larger than the sum of its proper divisors (3337844669579).

10000120111221 is a wasteful number, since it uses less digits than its factorization.

10000120111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70908.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10000120111221 its reverse (12211102100001), we get a palindrome (22211222211222).

The spelling of 10000120111221 in words is "ten trillion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".