10111022221 has 4 divisors (see below), whose sum is σ = 10705788252. Its totient is φ = 9516256192.

The previous prime is 10111022179. The next prime is 10111022239. The reversal of 10111022221 is 12222011101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12222011101 = 23 ⋅531391787.

It can be written as a sum of positive squares in 2 ways, for example, as 9408030025 + 702992196 = 96995^2 + 26514^2 .

It is not a de Polignac number, because 10111022221 - 2¹¹ = 10111020173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111022291) 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, 297382990 + ... + 297383023.

It is an arithmetic number, because the mean of its divisors is an integer number (2676447063).

Almost surely, 2^10111022221 is an apocalyptic number.

It is an amenable number.

10111022221 is a deficient number, since it is larger than the sum of its proper divisors (594766031).

10111022221 is an equidigital number, since it uses as much as digits as its factorization.

10111022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594766030.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10111022221 its reverse (12222011101), we get a palindrome (22333033322).

The spelling of 10111022221 in words is "ten billion, one hundred eleven million, twenty-two thousand, two hundred twenty-one".