112121001 has 12 divisors (see below), whose sum is σ = 171479412. Its totient is φ = 70350336.

The previous prime is 112120951. The next prime is 112121003. The reversal of 112121001 is 100121211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 104960025 + 7160976 = 10245^2 + 2676^2 .

It is not a de Polignac number, because 112121001 - 2¹⁷ = 111989929 is a prime.

It is a super-2 number, since 2×112121001² = 25142237730484002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (112121003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 366256 + ... + 366561.

It is an arithmetic number, because the mean of its divisors is an integer number (14289951).

Almost surely, 2^112121001 is an apocalyptic number.

It is an amenable number.

112121001 is a deficient number, since it is larger than the sum of its proper divisors (59358411).

112121001 is a wasteful number, since it uses less digits than its factorization.

112121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732840 (or 732837 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 112121001 is about 10588.7204609433. The cubic root of 112121001 is about 482.2019794213.

Adding to 112121001 its reverse (100121211), we get a palindrome (212242212).

It can be divided in two parts, 1121 and 21001, that added together give a palindrome (22122).

The spelling of 112121001 in words is "one hundred twelve million, one hundred twenty-one thousand, one".