1012221112 has 16 divisors (see below), whose sum is σ = 2169045360. Its totient is φ = 433809024.

The previous prime is 1012221109. The next prime is 1012221113. The reversal of 1012221112 is 2111222101.

It is a junction number, because it is equal to n+sod(n) for n = 1012221092 and 1012221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012221113) 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, 9037633 + ... + 9037744.

It is an arithmetic number, because the mean of its divisors is an integer number (135565335).

Almost surely, 2^1012221112 is an apocalyptic number.

It is an amenable number.

1012221112 is an abundant number, since it is smaller than the sum of its proper divisors (1156824248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1012221112 is a wasteful number, since it uses less digits than its factorization.

1012221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18075390 (or 18075386 counting only the distinct ones).

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

The square root of 1012221112 is about 31815.4225494492. The cubic root of 1012221112 is about 1004.0572206982.

Adding to 1012221112 its reverse (2111222101), we get a palindrome (3123443213).

The spelling of 1012221112 in words is "one billion, twelve million, two hundred twenty-one thousand, one hundred twelve".