155332141021 has 4 divisors (see below), whose sum is σ = 156706761852. Its totient is φ = 153957520192.

The previous prime is 155332141009. The next prime is 155332141031. The reversal of 155332141021 is 120141233551.

155332141021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120141233551 = 43159 ⋅2783689.

It can be written as a sum of positive squares in 2 ways, for example, as 5264228025 + 150067912996 = 72555^2 + 387386^2 .

It is a cyclic number.

It is not a de Polignac number, because 155332141021 - 2²⁹ = 154795270109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155332141031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687310246 + ... + 687310471.

It is an arithmetic number, because the mean of its divisors is an integer number (39176690463).

Almost surely, 2^155332141021 is an apocalyptic number.

It is an amenable number.

155332141021 is a deficient number, since it is larger than the sum of its proper divisors (1374620831).

155332141021 is a wasteful number, since it uses less digits than its factorization.

155332141021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374620830.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 155332141021 its reverse (120141233551), we get a palindrome (275473374572).

The spelling of 155332141021 in words is "one hundred fifty-five billion, three hundred thirty-two million, one hundred forty-one thousand, twenty-one".