121420425 has 24 divisors (see below), whose sum is σ = 229427776. Its totient is φ = 55506240.

The previous prime is 121420391. The next prime is 121420501. The reversal of 121420425 is 524024121.

It is not a de Polignac number, because 121420425 - 2¹⁷ = 121289353 is a prime.

It is a super-3 number, since 3×121420425³ (a number of 25 digits) contains 333 as substring.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115114 + ... + 116163.

Almost surely, 2^121420425 is an apocalyptic number.

121420425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121420425 is a deficient number, since it is larger than the sum of its proper divisors (108007351).

121420425 is a wasteful number, since it uses less digits than its factorization.

121420425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231297 (or 231292 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 121420425 is about 11019.0936560136. The cubic root of 121420425 is about 495.1809357936.

Adding to 121420425 its reverse (524024121), we get a palindrome (645444546).

The spelling of 121420425 in words is "one hundred twenty-one million, four hundred twenty thousand, four hundred twenty-five".