1001221112 has 32 divisors (see below), whose sum is σ = 1987977600. Its totient is φ = 471410784.

The previous prime is 1001221097. The next prime is 1001221127. The reversal of 1001221112 is 2111221001.

It is an interprime number because it is at equal distance from previous prime (1001221097) and next prime (1001221127).

It is a super-2 number, since 2×1001221112² = 2004887430229033088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001221093 and 1001221102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5663 + ... + 45105.

It is an arithmetic number, because the mean of its divisors is an integer number (62124300).

Almost surely, 2^1001221112 is an apocalyptic number.

It is an amenable number.

1001221112 is a deficient number, since it is larger than the sum of its proper divisors (986756488).

1001221112 is a wasteful number, since it uses less digits than its factorization.

1001221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39635 (or 39631 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1001221112 is about 31642.0781871229. The cubic root of 1001221112 is about 1000.4068717662.

Adding to 1001221112 its reverse (2111221001), we get a palindrome (3112442113).

The spelling of 1001221112 in words is "one billion, one million, two hundred twenty-one thousand, one hundred twelve".