10204111221 has 16 divisors (see below), whose sum is σ = 13634568000. Its totient is φ = 6788216960.

The previous prime is 10204111219. The next prime is 10204111271. The reversal of 10204111221 is 12211140201.

It is a cyclic number.

It is not a de Polignac number, because 10204111221 - 2¹ = 10204111219 is a prime.

It is a super-2 number, since 2×10204111221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10204111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10204111271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4284451 + ... + 4286831.

It is an arithmetic number, because the mean of its divisors is an integer number (852160500).

Almost surely, 2^10204111221 is an apocalyptic number.

It is an amenable number.

10204111221 is a deficient number, since it is larger than the sum of its proper divisors (3430456779).

10204111221 is a wasteful number, since it uses less digits than its factorization.

10204111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10204111221 its reverse (12211140201), we get a palindrome (22415251422).

The spelling of 10204111221 in words is "ten billion, two hundred four million, one hundred eleven thousand, two hundred twenty-one".