121751600011 has 4 divisors (see below), whose sum is σ = 122328622024. Its totient is φ = 121174578000.

The previous prime is 121751599987. The next prime is 121751600027. The reversal of 121751600011 is 110006157121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121751600011 - 2¹⁷ = 121751468939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121751600051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288510690 + ... + 288511111.

It is an arithmetic number, because the mean of its divisors is an integer number (30582155506).

Almost surely, 2^121751600011 is an apocalyptic number.

121751600011 is a deficient number, since it is larger than the sum of its proper divisors (577022013).

121751600011 is an equidigital number, since it uses as much as digits as its factorization.

121751600011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577022012.

The product of its (nonzero) digits is 420, while the sum is 25.

Adding to 121751600011 its reverse (110006157121), we get a palindrome (231757757132).

The spelling of 121751600011 in words is "one hundred twenty-one billion, seven hundred fifty-one million, six hundred thousand, eleven".