121755372215 has 32 divisors (see below), whose sum is σ = 154355544000. Its totient is φ = 91942760448.

The previous prime is 121755372191. The next prime is 121755372227. The reversal of 121755372215 is 512273557121.

It is a cyclic number.

It is not a de Polignac number, because 121755372215 - 2¹⁰ = 121755371191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64453991 + ... + 64455879.

It is an arithmetic number, because the mean of its divisors is an integer number (4823610750).

Almost surely, 2^121755372215 is an apocalyptic number.

121755372215 is a deficient number, since it is larger than the sum of its proper divisors (32600171785).

121755372215 is a wasteful number, since it uses less digits than its factorization.

121755372215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4019.

The product of its digits is 147000, while the sum is 41.

The spelling of 121755372215 in words is "one hundred twenty-one billion, seven hundred fifty-five million, three hundred seventy-two thousand, two hundred fifteen".