112121509 has 2 divisors, whose sum is σ = 112121510. Its totient is φ = 112121508.

The previous prime is 112121437. The next prime is 112121519. The reversal of 112121509 is 905121211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60497284 + 51624225 = 7778^2 + 7185^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121509 - 2⁷ = 112121381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 112121509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112121519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56060754 + 56060755.

It is an arithmetic number, because the mean of its divisors is an integer number (56060755).

Almost surely, 2^112121509 is an apocalyptic number.

It is an amenable number.

112121509 is a deficient number, since it is larger than the sum of its proper divisors (1).

112121509 is an equidigital number, since it uses as much as digits as its factorization.

112121509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 112121509 is about 10588.7444487059. The cubic root of 112121509 is about 482.2027076768.

It can be divided in two parts, 11212 and 1509, that added together give a palindrome (12721).

The spelling of 112121509 in words is "one hundred twelve million, one hundred twenty-one thousand, five hundred nine".