122121403 has 4 divisors (see below), whose sum is σ = 122153128. Its totient is φ = 122089680.

The previous prime is 122121383. The next prime is 122121413. The reversal of 122121403 is 304121221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304121221 = 4349 ⋅69929.

It is a cyclic number.

It is not a de Polignac number, because 122121403 - 2⁵ = 122121371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122121413) 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 in 3 ways as a sum of consecutive naturals, for example, 9138 + ... + 18103.

It is an arithmetic number, because the mean of its divisors is an integer number (30538282).

Almost surely, 2^122121403 is an apocalyptic number.

122121403 is a deficient number, since it is larger than the sum of its proper divisors (31725).

122121403 is an equidigital number, since it uses as much as digits as its factorization.

122121403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31724.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 122121403 is about 11050.8553062648. The cubic root of 122121403 is about 496.1320253707.

Adding to 122121403 its reverse (304121221), we get a palindrome (426242624).

The spelling of 122121403 in words is "one hundred twenty-two million, one hundred twenty-one thousand, four hundred three".