10354221221 has 4 divisors (see below), whose sum is σ = 10606763244. Its totient is φ = 10101679200.

The previous prime is 10354221211. The next prime is 10354221233. The reversal of 10354221221 is 12212245301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12212245301 = 23 ⋅530967187.

It can be written as a sum of positive squares in 2 ways, for example, as 357021025 + 9997200196 = 18895^2 + 99986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10354221221 is a prime.

It is a super-3 number, since 3×10354221221³ (a number of 31 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 (10354221211) 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, 126270950 + ... + 126271031.

It is an arithmetic number, because the mean of its divisors is an integer number (2651690811).

Almost surely, 2^10354221221 is an apocalyptic number.

It is an amenable number.

10354221221 is a deficient number, since it is larger than the sum of its proper divisors (252542023).

10354221221 is an equidigital number, since it uses as much as digits as its factorization.

10354221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252542022.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 10354221221 its reverse (12212245301), we get a palindrome (22566466522).

The spelling of 10354221221 in words is "ten billion, three hundred fifty-four million, two hundred twenty-one thousand, two hundred twenty-one".