121155141501 has 32 divisors (see below), whose sum is σ = 186350269440. Its totient is φ = 77712696000.

The previous prime is 121155141487. The next prime is 121155141599. The reversal of 121155141501 is 105141551121.

121155141501 is a `hidden beast` number, since 1 + 2 + 1 + 15 + 5 + 141 + 501 = 666.

It is not a de Polignac number, because 121155141501 - 2²¹ = 121153044349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121155141001) 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 31 ways as a sum of consecutive naturals, for example, 273550 + ... + 563151.

It is an arithmetic number, because the mean of its divisors is an integer number (5823445920).

Almost surely, 2^121155141501 is an apocalyptic number.

It is an amenable number.

121155141501 is a deficient number, since it is larger than the sum of its proper divisors (65195127939).

121155141501 is a wasteful number, since it uses less digits than its factorization.

121155141501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836914 (or 836908 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 27.

Adding to 121155141501 its reverse (105141551121), we get a palindrome (226296692622).

The spelling of 121155141501 in words is "one hundred twenty-one billion, one hundred fifty-five million, one hundred forty-one thousand, five hundred one".