121711615221611 has 8 divisors (see below), whose sum is σ = 125980133689344. Its totient is φ = 117464492837160.

The previous prime is 121711615221583. The next prime is 121711615221613. The reversal of 121711615221611 is 116122516117121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121711615221611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121711615221613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5349009245 + ... + 5349031998.

It is an arithmetic number, because the mean of its divisors is an integer number (15747516711168).

Almost surely, 2^{121711615221611} is an apocalyptic number.

121711615221611 is a deficient number, since it is larger than the sum of its proper divisors (4268518467733).

121711615221611 is a wasteful number, since it uses less digits than its factorization.

121711615221611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698041641.

The product of its digits is 10080, while the sum is 38.

The spelling of 121711615221611 in words is "one hundred twenty-one trillion, seven hundred eleven billion, six hundred fifteen million, two hundred twenty-one thousand, six hundred eleven".