121215402501 has 8 divisors (see below), whose sum is σ = 163050807360. Its totient is φ = 80095132992.

The previous prime is 121215402431. The next prime is 121215402521. The reversal of 121215402501 is 105204512121.

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 121215402501 - 2²¹ = 121213305349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121215402521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178783441 + ... + 178784118.

It is an arithmetic number, because the mean of its divisors is an integer number (20381350920).

Almost surely, 2^121215402501 is an apocalyptic number.

It is an amenable number.

121215402501 is a deficient number, since it is larger than the sum of its proper divisors (41835404859).

121215402501 is a wasteful number, since it uses less digits than its factorization.

121215402501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357567675.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 121215402501 its reverse (105204512121), we get a palindrome (226419914622).

The spelling of 121215402501 in words is "one hundred twenty-one billion, two hundred fifteen million, four hundred two thousand, five hundred one".