155141104021 has 2 divisors, whose sum is σ = 155141104022. Its totient is φ = 155141104020.

The previous prime is 155141104009. The next prime is 155141104043. The reversal of 155141104021 is 120401141551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153558178225 + 1582925796 = 391865^2 + 39786^2 .

It is an emirp because it is prime and its reverse (120401141551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155141104021 - 2²⁹ = 154604233109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155141204021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77570552010 + 77570552011.

It is an arithmetic number, because the mean of its divisors is an integer number (77570552011).

Almost surely, 2^155141104021 is an apocalyptic number.

It is an amenable number.

155141104021 is a deficient number, since it is larger than the sum of its proper divisors (1).

155141104021 is an equidigital number, since it uses as much as digits as its factorization.

155141104021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 155141104021 its reverse (120401141551), we get a palindrome (275542245572).

The spelling of 155141104021 in words is "one hundred fifty-five billion, one hundred forty-one million, one hundred four thousand, twenty-one".