155121119 has 2 divisors, whose sum is σ = 155121120. Its totient is φ = 155121118.

The previous prime is 155121079. The next prime is 155121121. The reversal of 155121119 is 911121551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155121119 - 2¹² = 155117023 is a prime.

It is a super-2 number, since 2×155121119² = 48125123119624322, which contains 22 as substring.

Together with 155121121, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155121019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77560559 + 77560560.

It is an arithmetic number, because the mean of its divisors is an integer number (77560560).

Almost surely, 2^155121119 is an apocalyptic number.

155121119 is a deficient number, since it is larger than the sum of its proper divisors (1).

155121119 is an equidigital number, since it uses as much as digits as its factorization.

155121119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 26.

The square root of 155121119 is about 12454.7629042066. The cubic root of 155121119 is about 537.3084158743.

The spelling of 155121119 in words is "one hundred fifty-five million, one hundred twenty-one thousand, one hundred nineteen".