155210442322121 has 8 divisors (see below), whose sum is σ = 156199452320064. Its totient is φ = 154221437494800.

The previous prime is 155210442322069. The next prime is 155210442322153. The reversal of 155210442322121 is 121223244012551.

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

It is a cyclic number.

It is not a de Polignac number, because 155210442322121 - 2⁴² = 150812395811017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155210442322181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72204956 + ... + 74323458.

It is an arithmetic number, because the mean of its divisors is an integer number (19524931540008).

Almost surely, 2^{155210442322121} is an apocalyptic number.

It is an amenable number.

155210442322121 is a deficient number, since it is larger than the sum of its proper divisors (989009997943).

155210442322121 is a wasteful number, since it uses less digits than its factorization.

155210442322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585311.

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 155210442322121 its reverse (121223244012551), we get a palindrome (276433686334672).

The spelling of 155210442322121 in words is "one hundred fifty-five trillion, two hundred ten billion, four hundred forty-two million, three hundred twenty-two thousand, one hundred twenty-one".