121225429 has 4 divisors (see below), whose sum is σ = 130550476. Its totient is φ = 111900384.

The previous prime is 121225411. The next prime is 121225439. The reversal of 121225429 is 924522121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18507204 + 102718225 = 4302^2 + 10135^2 .

It is a cyclic number.

It is not a de Polignac number, because 121225429 - 2¹¹ = 121223381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121225397 and 121225406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121225439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4662504 + ... + 4662529.

It is an arithmetic number, because the mean of its divisors is an integer number (32637619).

Almost surely, 2^121225429 is an apocalyptic number.

It is an amenable number.

121225429 is a deficient number, since it is larger than the sum of its proper divisors (9325047).

121225429 is an equidigital number, since it uses as much as digits as its factorization.

121225429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9325046.

The product of its digits is 2880, while the sum is 28.

The square root of 121225429 is about 11010.2420046064. The cubic root of 121225429 is about 494.9157139761.

The spelling of 121225429 in words is "one hundred twenty-one million, two hundred twenty-five thousand, four hundred twenty-nine".