155541062121 has 8 divisors (see below), whose sum is σ = 207478536000. Its totient is φ = 103648814832.

The previous prime is 155541062119. The next prime is 155541062143. The reversal of 155541062121 is 121260145551.

It is a happy number.

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

It is not a de Polignac number, because 155541062121 - 2¹ = 155541062119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155541062101) 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, 11298621 + ... + 11312378.

It is an arithmetic number, because the mean of its divisors is an integer number (25934817000).

Almost surely, 2^155541062121 is an apocalyptic number.

It is an amenable number.

155541062121 is a deficient number, since it is larger than the sum of its proper divisors (51937473879).

155541062121 is a wasteful number, since it uses less digits than its factorization.

155541062121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22613295.

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 155541062121 in words is "one hundred fifty-five billion, five hundred forty-one million, sixty-two thousand, one hundred twenty-one".