121443853 has 2 divisors, whose sum is σ = 121443854. Its totient is φ = 121443852.

The previous prime is 121443827. The next prime is 121443859. The reversal of 121443853 is 358344121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120516484 + 927369 = 10978^2 + 963^2 .

It is a cyclic number.

It is not a de Polignac number, because 121443853 - 2⁹ = 121443341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121443859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60721926 + 60721927.

It is an arithmetic number, because the mean of its divisors is an integer number (60721927).

Almost surely, 2^121443853 is an apocalyptic number.

It is an amenable number.

121443853 is a deficient number, since it is larger than the sum of its proper divisors (1).

121443853 is an equidigital number, since it uses as much as digits as its factorization.

121443853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 121443853 is about 11020.1566685778. The cubic root of 121443853 is about 495.2127820361.

Adding to 121443853 its reverse (358344121), we get a palindrome (479787974).

The spelling of 121443853 in words is "one hundred twenty-one million, four hundred forty-three thousand, eight hundred fifty-three".