121967500109 has 32 divisors (see below), whose sum is σ = 158842306560. Its totient is φ = 90943819200.

The previous prime is 121967500073. The next prime is 121967500133. The reversal of 121967500109 is 901005769121.

It is a de Polignac number, because none of the positive numbers 2^k-121967500109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121967500169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145574 + ... + 514904.

It is an arithmetic number, because the mean of its divisors is an integer number (4963822080).

Almost surely, 2^121967500109 is an apocalyptic number.

121967500109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

121967500109 is a deficient number, since it is larger than the sum of its proper divisors (36874806451).

121967500109 is a wasteful number, since it uses less digits than its factorization.

121967500109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369561.

The product of its (nonzero) digits is 34020, while the sum is 41.

The spelling of 121967500109 in words is "one hundred twenty-one billion, nine hundred sixty-seven million, five hundred thousand, one hundred nine".