112121557 has 2 divisors, whose sum is σ = 112121558. Its totient is φ = 112121556.

The previous prime is 112121539. The next prime is 112121591. The reversal of 112121557 is 755121211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70660836 + 41460721 = 8406^2 + 6439^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121557 - 2²³ = 103732949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112121057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56060778 + 56060779.

It is an arithmetic number, because the mean of its divisors is an integer number (56060779).

Almost surely, 2^112121557 is an apocalyptic number.

It is an amenable number.

112121557 is a deficient number, since it is larger than the sum of its proper divisors (1).

112121557 is an equidigital number, since it uses as much as digits as its factorization.

112121557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 700, while the sum is 25.

The square root of 112121557 is about 10588.7467152633. The cubic root of 112121557 is about 482.2027764883.

Adding to 112121557 its reverse (755121211), we get a palindrome (867242768).

It can be divided in two parts, 11212 and 1557, that added together give a square (12769 = 113²).

The spelling of 112121557 in words is "one hundred twelve million, one hundred twenty-one thousand, five hundred fifty-seven".