10121120222221 has 4 divisors (see below), whose sum is σ = 10123231873212. Its totient is φ = 10119008571232.

The previous prime is 10121120222179. The next prime is 10121120222249. The reversal of 10121120222221 is 12222202112101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8868847319721 + 1252272902500 = 2978061^2 + 1119050^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121120222221 - 2⁷ = 10121120222093 is a prime.

It is a super-3 number, since 3×10121120222221³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121120222321) 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 3 ways as a sum of consecutive naturals, for example, 1055818306 + ... + 1055827891.

It is an arithmetic number, because the mean of its divisors is an integer number (2530807968303).

Almost surely, 2^{10121120222221} is an apocalyptic number.

It is an amenable number.

10121120222221 is a deficient number, since it is larger than the sum of its proper divisors (2111650991).

10121120222221 is an equidigital number, since it uses as much as digits as its factorization.

10121120222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111650990.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10121120222221 its reverse (12222202112101), we get a palindrome (22343322334322).

The spelling of 10121120222221 in words is "ten trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-one".