10202222121 has 256 divisors, whose sum is σ = 19856793600. Its totient is φ = 4502863872.

The previous prime is 10202222089. The next prime is 10202222143. The reversal of 10202222121 is 12122220201.

It is not a de Polignac number, because 10202222121 - 2⁵ = 10202222089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10202222121.

It is not an unprimeable number, because it can be changed into a prime (10202222161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 172918990 + ... + 172919048.

It is an arithmetic number, because the mean of its divisors is an integer number (77565600).

Almost surely, 2^10202222121 is an apocalyptic number.

It is an amenable number.

10202222121 is a deficient number, since it is larger than the sum of its proper divisors (9654571479).

10202222121 is a wasteful number, since it uses less digits than its factorization.

10202222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 10202222121 its reverse (12122220201), we get a palindrome (22324442322).

The spelling of 10202222121 in words is "ten billion, two hundred two million, two hundred twenty-two thousand, one hundred twenty-one".