121513505212 has 48 divisors (see below), whose sum is σ = 235259458560. Its totient is φ = 54457256000.

The previous prime is 121513505177. The next prime is 121513505213. The reversal of 121513505212 is 212505315121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121513505213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1004913 + ... + 1119319.

It is an arithmetic number, because the mean of its divisors is an integer number (4901238720).

Almost surely, 2^121513505212 is an apocalyptic number.

It is an amenable number.

121513505212 is a deficient number, since it is larger than the sum of its proper divisors (113745953348).

121513505212 is a wasteful number, since it uses less digits than its factorization.

121513505212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114762 (or 114760 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 121513505212 in words is "one hundred twenty-one billion, five hundred thirteen million, five hundred five thousand, two hundred twelve".