235215121 has 2 divisors, whose sum is σ = 235215122. Its totient is φ = 235215120.

The previous prime is 235215109. The next prime is 235215137. The reversal of 235215121 is 121512532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206324496 + 28890625 = 14364^2 + 5375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-235215121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 235215092 and 235215101.

It is not a weakly prime, because it can be changed into another prime (235215161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117607560 + 117607561.

It is an arithmetic number, because the mean of its divisors is an integer number (117607561).

Almost surely, 2^235215121 is an apocalyptic number.

It is an amenable number.

235215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

235215121 is an equidigital number, since it uses as much as digits as its factorization.

235215121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 22.

The square root of 235215121 is about 15336.7245851257. The cubic root of 235215121 is about 617.2888215572.

Adding to 235215121 its reverse (121512532), we get a palindrome (356727653).

The spelling of 235215121 in words is "two hundred thirty-five million, two hundred fifteen thousand, one hundred twenty-one".