121263829815828 has 96 divisors (see below), whose sum is σ = 343694452541440. Its totient is φ = 32504619496320.

The previous prime is 121263829815773. The next prime is 121263829815829. The reversal of 121263829815828 is 828518928362121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121263829815829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368669803 + ... + 368998578.

Almost surely, 2^{121263829815828} is an apocalyptic number.

It is an amenable number.

121263829815828 is an abundant number, since it is smaller than the sum of its proper divisors (222430622725612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121263829815828 is a wasteful number, since it uses less digits than its factorization.

121263829815828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737668517 (or 737668515 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 66.

The spelling of 121263829815828 in words is "one hundred twenty-one trillion, two hundred sixty-three billion, eight hundred twenty-nine million, eight hundred fifteen thousand, eight hundred twenty-eight".