121239200811 has 8 divisors (see below), whose sum is σ = 170160281920. Its totient is φ = 76572126792.

The previous prime is 121239200807. The next prime is 121239200821. The reversal of 121239200811 is 118002932121.

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

It is not a de Polignac number, because 121239200811 - 2² = 121239200807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121239200821) 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, 1063501705 + ... + 1063501818.

It is an arithmetic number, because the mean of its divisors is an integer number (21270035240).

Almost surely, 2^121239200811 is an apocalyptic number.

121239200811 is a deficient number, since it is larger than the sum of its proper divisors (48921081109).

121239200811 is a wasteful number, since it uses less digits than its factorization.

121239200811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127003545.

The product of its (nonzero) digits is 1728, while the sum is 30.

The spelling of 121239200811 in words is "one hundred twenty-one billion, two hundred thirty-nine million, two hundred thousand, eight hundred eleven".