151121 has 2 divisors, whose sum is σ = 151122. Its totient is φ = 151120.

The previous prime is 151091. The next prime is 151141. The reversal of 151121 is 121151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83521 + 67600 = 289^2 + 260^2 .

It is an emirp because it is prime and its reverse (121151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151121 - 2⁶ = 151057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (151141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75560 + 75561.

It is an arithmetic number, because the mean of its divisors is an integer number (75561).

2¹⁵¹¹²¹ is an apocalyptic number.

It is an amenable number.

151121 is a deficient number, since it is larger than the sum of its proper divisors (1).

151121 is an equidigital number, since it uses as much as digits as its factorization.

151121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10, while the sum is 11.

The square root of 151121 is about 388.7428455933. The cubic root of 151121 is about 53.2649601262.

Adding to 151121 its reverse (121151), we get a palindrome (272272).

It can be divided in two parts, 151 and 121, that added together give a palindrome (272).

The spelling of 151121 in words is "one hundred fifty-one thousand, one hundred twenty-one".