121215255202 has 8 divisors (see below), whose sum is σ = 181828150812. Its totient is φ = 60605871600.

The previous prime is 121215255169. The next prime is 121215255229. The reversal of 121215255202 is 202552512121.

It can be written as a sum of positive squares in 2 ways, for example, as 110236616361 + 10978638841 = 332019^2 + 104779^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789949 + ... + 930832.

Almost surely, 2^121215255202 is an apocalyptic number.

121215255202 is a deficient number, since it is larger than the sum of its proper divisors (60612895610).

121215255202 is a wasteful number, since it uses less digits than its factorization.

121215255202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756004.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 121215255202 its reverse (202552512121), we get a palindrome (323767767323).

The spelling of 121215255202 in words is "one hundred twenty-one billion, two hundred fifteen million, two hundred fifty-five thousand, two hundred two".