121615836 has 12 divisors (see below), whose sum is σ = 283770312. Its totient is φ = 40538608.

The previous prime is 121615831. The next prime is 121615847. The reversal of 121615836 is 638516121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 121615797 and 121615806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121615831) 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 3 ways as a sum of consecutive naturals, for example, 5067315 + ... + 5067338.

It is an arithmetic number, because the mean of its divisors is an integer number (23647526).

Almost surely, 2^121615836 is an apocalyptic number.

It is an amenable number.

121615836 is an abundant number, since it is smaller than the sum of its proper divisors (162154476).

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

121615836 is a wasteful number, since it uses less digits than its factorization.

121615836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10134660 (or 10134658 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 121615836 is about 11027.9570184146. The cubic root of 121615836 is about 495.4464373583.

The spelling of 121615836 in words is "one hundred twenty-one million, six hundred fifteen thousand, eight hundred thirty-six".