155122121497 has 8 divisors (see below), whose sum is σ = 177285425600. Its totient is φ = 132959567664.

The previous prime is 155122121437. The next prime is 155122121501. The reversal of 155122121497 is 794121221551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155122121497 - 2¹⁹ = 155121597209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155122121437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363379 + ... + 665047.

It is an arithmetic number, because the mean of its divisors is an integer number (22160678200).

Almost surely, 2^155122121497 is an apocalyptic number.

It is an amenable number.

155122121497 is a deficient number, since it is larger than the sum of its proper divisors (22163304103).

155122121497 is an equidigital number, since it uses as much as digits as its factorization.

155122121497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375135.

The product of its digits is 50400, while the sum is 40.

The spelling of 155122121497 in words is "one hundred fifty-five billion, one hundred twenty-two million, one hundred twenty-one thousand, four hundred ninety-seven".