10111012221 has 16 divisors (see below), whose sum is σ = 14074623360. Its totient is φ = 6444335040.

The previous prime is 10111012213. The next prime is 10111012229. The reversal of 10111012221 is 12221011101.

It is an interprime number because it is at equal distance from previous prime (10111012213) and next prime (10111012229).

It is not a de Polignac number, because 10111012221 - 2³ = 10111012213 is a prime.

It is a super-2 number, since 2×10111012221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10111012197 and 10111012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111012229) 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, 103891 + ... + 176111.

It is an arithmetic number, because the mean of its divisors is an integer number (879663960).

Almost surely, 2^10111012221 is an apocalyptic number.

It is an amenable number.

10111012221 is a deficient number, since it is larger than the sum of its proper divisors (3963611139).

10111012221 is a wasteful number, since it uses less digits than its factorization.

10111012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74276.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10111012221 its reverse (12221011101), we get a palindrome (22332023322).

The spelling of 10111012221 in words is "ten billion, one hundred eleven million, twelve thousand, two hundred twenty-one".