121882401 has 20 divisors (see below), whose sum is σ = 192783492. Its totient is φ = 76474368.

The previous prime is 121882399. The next prime is 121882441. The reversal of 121882401 is 104288121.

It can be written as a sum of positive squares in 2 ways, for example, as 99980001 + 21902400 = 9999^2 + 4680^2 .

It is not a de Polignac number, because 121882401 - 2¹ = 121882399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121882441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42880 + ... + 45633.

Almost surely, 2^121882401 is an apocalyptic number.

It is an amenable number.

121882401 is a deficient number, since it is larger than the sum of its proper divisors (70901091).

121882401 is an equidigital number, since it uses as much as digits as its factorization.

121882401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88542 (or 88533 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 121882401 is about 11040.0362771143. The cubic root of 121882401 is about 495.8081564380.

The spelling of 121882401 in words is "one hundred twenty-one million, eight hundred eighty-two thousand, four hundred one".