155530122122 has 4 divisors (see below), whose sum is σ = 233295183186. Its totient is φ = 77765061060.

The previous prime is 155530122107. The next prime is 155530122149. The reversal of 155530122122 is 221221035551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221221035551 = 461609 ⋅479239.

It can be written as a sum of positive squares in only one way, i.e., 133406832001 + 22123290121 = 365249^2 + 148739^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38882530529 + ... + 38882530532.

Almost surely, 2^155530122122 is an apocalyptic number.

155530122122 is a deficient number, since it is larger than the sum of its proper divisors (77765061064).

155530122122 is an equidigital number, since it uses as much as digits as its factorization.

155530122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77765061063.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 155530122122 its reverse (221221035551), we get a palindrome (376751157673).

The spelling of 155530122122 in words is "one hundred fifty-five billion, five hundred thirty million, one hundred twenty-two thousand, one hundred twenty-two".