121356501311 has 4 divisors (see below), whose sum is σ = 121364275824. Its totient is φ = 121348726800.

The previous prime is 121356501281. The next prime is 121356501323. The reversal of 121356501311 is 113105653121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121356501311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121356500311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3863795 + ... + 3895076.

It is an arithmetic number, because the mean of its divisors is an integer number (30341068956).

Almost surely, 2^121356501311 is an apocalyptic number.

121356501311 is a deficient number, since it is larger than the sum of its proper divisors (7774513).

121356501311 is an equidigital number, since it uses as much as digits as its factorization.

121356501311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7774512.

The product of its (nonzero) digits is 2700, while the sum is 29.

The spelling of 121356501311 in words is "one hundred twenty-one billion, three hundred fifty-six million, five hundred one thousand, three hundred eleven".