151121081 has 2 divisors, whose sum is σ = 151121082. Its totient is φ = 151121080.

The previous prime is 151121011. The next prime is 151121083. The reversal of 151121081 is 180121151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 71554681 = 8920^2 + 8459^2 .

It is a cyclic number.

It is not a de Polignac number, because 151121081 - 2¹⁸ = 150858937 is a prime.

It is a super-2 number, since 2×151121081² = 45675162245217122, which contains 22 as substring.

Together with 151121083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (151121083) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75560540 + 75560541.

It is an arithmetic number, because the mean of its divisors is an integer number (75560541).

Almost surely, 2^151121081 is an apocalyptic number.

It is an amenable number.

151121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

151121081 is an equidigital number, since it uses as much as digits as its factorization.

151121081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 20.

The square root of 151121081 is about 12293.1314562238. The cubic root of 151121081 is about 532.6496964279.

The spelling of 151121081 in words is "one hundred fifty-one million, one hundred twenty-one thousand, eighty-one".