10356403722221 has 4 divisors (see below), whose sum is σ = 10361268169500. Its totient is φ = 10351539274944.

The previous prime is 10356403722191. The next prime is 10356403722271. The reversal of 10356403722221 is 12222730465301.

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 4896638737225 + 5459764984996 = 2212835^2 + 2336614^2 .

It is a cyclic number.

It is not a de Polignac number, because 10356403722221 - 2⁶ = 10356403722157 is a prime.

It is a super-3 number, since 3×10356403722221³ (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 (10356403722271) 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, 2432220446 + ... + 2432224703.

It is an arithmetic number, because the mean of its divisors is an integer number (2590317042375).

Almost surely, 2^{10356403722221} is an apocalyptic number.

It is an amenable number.

10356403722221 is a deficient number, since it is larger than the sum of its proper divisors (4864447279).

10356403722221 is an equidigital number, since it uses as much as digits as its factorization.

10356403722221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864447278.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 10356403722221 in words is "ten trillion, three hundred fifty-six billion, four hundred three million, seven hundred twenty-two thousand, two hundred twenty-one".