121005016641 has 16 divisors (see below), whose sum is σ = 179276872320. Its totient is φ = 80665429680.

The previous prime is 121005016637. The next prime is 121005016679. The reversal of 121005016641 is 146610500121.

121005016641 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 0 + 5 + 0 + 16 + 641 = 666.

It is not a de Polignac number, because 121005016641 - 2² = 121005016637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121005016621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396091 + ... + 631583.

It is an arithmetic number, because the mean of its divisors is an integer number (11204804520).

Almost surely, 2^121005016641 is an apocalyptic number.

It is an amenable number.

121005016641 is a deficient number, since it is larger than the sum of its proper divisors (58271855679).

121005016641 is a wasteful number, since it uses less digits than its factorization.

121005016641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254533 (or 254527 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 121005016641 its reverse (146610500121), we get a palindrome (267615516762).

The spelling of 121005016641 in words is "one hundred twenty-one billion, five million, sixteen thousand, six hundred forty-one".