121321421325 has 60 divisors (see below), whose sum is σ = 242016125428. Its totient is φ = 59727456000.

The previous prime is 121321421311. The next prime is 121321421327. The reversal of 121321421325 is 523124123121.

It is a happy number.

121321421325 is a `hidden beast` number, since 1 + 213 + 2 + 1 + 421 + 3 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 16450371081 + 104871050244 = 128259^2 + 323838^2 .

It is not a de Polignac number, because 121321421325 - 2¹¹ = 121321419277 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321421327) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2277976 + ... + 2330625.

Almost surely, 2^121321421325 is an apocalyptic number.

121321421325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121321421325 is a deficient number, since it is larger than the sum of its proper divisors (120694704103).

121321421325 is a wasteful number, since it uses less digits than its factorization.

121321421325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608636 (or 4608622 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

Adding to 121321421325 its reverse (523124123121), we get a palindrome (644445544446).

The spelling of 121321421325 in words is "one hundred twenty-one billion, three hundred twenty-one million, four hundred twenty-one thousand, three hundred twenty-five".