121455635516 has 24 divisors (see below), whose sum is σ = 225584762256. Its totient is φ = 57019818240.

The previous prime is 121455635513. The next prime is 121455635519. The reversal of 121455635516 is 615536554121.

It is an interprime number because it is at equal distance from previous prime (121455635513) and next prime (121455635519).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121455635513) 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 7 ways as a sum of consecutive naturals, for example, 2092646 + ... + 2149901.

It is an arithmetic number, because the mean of its divisors is an integer number (9399365094).

Almost surely, 2^121455635516 is an apocalyptic number.

It is an amenable number.

121455635516 is a deficient number, since it is larger than the sum of its proper divisors (104129126740).

121455635516 is a wasteful number, since it uses less digits than its factorization.

121455635516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242989 (or 4242987 counting only the distinct ones).

The product of its digits is 540000, while the sum is 44.

The spelling of 121455635516 in words is "one hundred twenty-one billion, four hundred fifty-five million, six hundred thirty-five thousand, five hundred sixteen".