121232345 has 16 divisors (see below), whose sum is σ = 157589712. Its totient is φ = 88999680.

The previous prime is 121232311. The next prime is 121232347. The reversal of 121232345 is 543232121.

121232345 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 8 ways, for example, as 2226064 + 119006281 = 1492^2 + 10909^2 .

It is not a de Polignac number, because 121232345 - 2¹⁶ = 121166809 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121232345.

It is not an unprimeable number, because it can be changed into a prime (121232347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5855 + ... + 16635.

It is an arithmetic number, because the mean of its divisors is an integer number (9849357).

Almost surely, 2^121232345 is an apocalyptic number.

It is an amenable number.

121232345 is a deficient number, since it is larger than the sum of its proper divisors (36357367).

121232345 is a wasteful number, since it uses less digits than its factorization.

121232345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10972.

The product of its digits is 1440, while the sum is 23.

The square root of 121232345 is about 11010.5560713345. The cubic root of 121232345 is about 494.9251255657.

Adding to 121232345 its reverse (543232121), we get a palindrome (664464466).

The spelling of 121232345 in words is "one hundred twenty-one million, two hundred thirty-two thousand, three hundred forty-five".