10211221043321 has 4 divisors (see below), whose sum is σ = 10212997222500. Its totient is φ = 10209444864144.

The previous prime is 10211221043297. The next prime is 10211221043333. The reversal of 10211221043321 is 12334012211201.

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 382463086096 + 9828757957225 = 618436^2 + 3135085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211221043321 is a prime.

It is a super-2 number, since 2×10211221043321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10211221043371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888080966 + ... + 888092463.

It is an arithmetic number, because the mean of its divisors is an integer number (2553249305625).

Almost surely, 2^{10211221043321} is an apocalyptic number.

It is an amenable number.

10211221043321 is a deficient number, since it is larger than the sum of its proper divisors (1776179179).

10211221043321 is an equidigital number, since it uses as much as digits as its factorization.

10211221043321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776179178.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 10211221043321 its reverse (12334012211201), we get a palindrome (22545233254522).

The spelling of 10211221043321 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, forty-three thousand, three hundred twenty-one".