151711121 has 4 divisors (see below), whose sum is σ = 151928244. Its totient is φ = 151494000.

The previous prime is 151711099. The next prime is 151711129. The reversal of 151711121 is 121117151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121117151 = 1559 ⋅77689.

It can be written as a sum of positive squares in 2 ways, for example, as 144480400 + 7230721 = 12020^2 + 2689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151711121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151711093 and 151711102.

It is not an unprimeable number, because it can be changed into a prime (151711129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107510 + ... + 108911.

It is an arithmetic number, because the mean of its divisors is an integer number (37982061).

Almost surely, 2^151711121 is an apocalyptic number.

It is an amenable number.

151711121 is a deficient number, since it is larger than the sum of its proper divisors (217123).

151711121 is an equidigital number, since it uses as much as digits as its factorization.

151711121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217122.

The product of its digits is 70, while the sum is 20.

The square root of 151711121 is about 12317.1068437357. The cubic root of 151711121 is about 533.3420253358.

Adding to 151711121 its reverse (121117151), we get a palindrome (272828272).

The spelling of 151711121 in words is "one hundred fifty-one million, seven hundred eleven thousand, one hundred twenty-one".