121051515612 has 12 divisors (see below), whose sum is σ = 282453536456. Its totient is φ = 40350505200.

The previous prime is 121051515589. The next prime is 121051515617. The reversal of 121051515612 is 216515150121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121051515612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121051515617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5043813139 + ... + 5043813162.

Almost surely, 2^121051515612 is an apocalyptic number.

121051515612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121051515612 is an abundant number, since it is smaller than the sum of its proper divisors (161402020844).

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

121051515612 is a wasteful number, since it uses less digits than its factorization.

121051515612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10087626308 (or 10087626306 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 30.

Adding to 121051515612 its reverse (216515150121), we get a palindrome (337566665733).

The spelling of 121051515612 in words is "one hundred twenty-one billion, fifty-one million, five hundred fifteen thousand, six hundred twelve".