121425213 has 32 divisors (see below), whose sum is σ = 200601856. Its totient is φ = 63618048.

The previous prime is 121425209. The next prime is 121425217. The reversal of 121425213 is 312524121.

It is an interprime number because it is at equal distance from previous prime (121425209) and next prime (121425217).

It is not a de Polignac number, because 121425213 - 2² = 121425209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 121425213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121425217) 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 31 ways as a sum of consecutive naturals, for example, 41445 + ... + 44277.

It is an arithmetic number, because the mean of its divisors is an integer number (6268808).

Almost surely, 2^121425213 is an apocalyptic number.

121425213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121425213 is a deficient number, since it is larger than the sum of its proper divisors (79176643).

121425213 is a wasteful number, since it uses less digits than its factorization.

121425213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013.

The product of its digits is 480, while the sum is 21.

The square root of 121425213 is about 11019.3109131197. The cubic root of 121425213 is about 495.1874445699.

Adding to 121425213 its reverse (312524121), we get a palindrome (433949334).

The spelling of 121425213 in words is "one hundred twenty-one million, four hundred twenty-five thousand, two hundred thirteen".