10121101331221 has 4 divisors (see below), whose sum is σ = 10122941202444. Its totient is φ = 10119261460000.

The previous prime is 10121101331213. The next prime is 10121101331239. The reversal of 10121101331221 is 12213310112101.

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 4903394638321 + 5217706692900 = 2214361^2 + 2284230^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121101331221 - 2³ = 10121101331213 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 (10121101331521) 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, 919927360 + ... + 919938361.

It is an arithmetic number, because the mean of its divisors is an integer number (2530735300611).

Almost surely, 2^{10121101331221} is an apocalyptic number.

It is an amenable number.

10121101331221 is a deficient number, since it is larger than the sum of its proper divisors (1839871223).

10121101331221 is an equidigital number, since it uses as much as digits as its factorization.

10121101331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839871222.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 10121101331221 its reverse (12213310112101), we get a palindrome (22334411443322).

The spelling of 10121101331221 in words is "ten trillion, one hundred twenty-one billion, one hundred one million, three hundred thirty-one thousand, two hundred twenty-one".