121647746121 has 16 divisors (see below), whose sum is σ = 176960575488. Its totient is φ = 73718240400.

The previous prime is 121647746117. The next prime is 121647746131.

121647746121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 121647746121 - 2² = 121647746117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121647746131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139020 + ... + 512466.

It is an arithmetic number, because the mean of its divisors is an integer number (11060035968).

Almost surely, 2^121647746121 is an apocalyptic number.

121647746121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121647746121 is a deficient number, since it is larger than the sum of its proper divisors (55312829367).

121647746121 is a wasteful number, since it uses less digits than its factorization.

121647746121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383332.

The product of its digits is 112896, while the sum is 42.

It can be divided in two parts, 121647 and 746121, that added together give a palindrome (867768).

The spelling of 121647746121 in words is "one hundred twenty-one billion, six hundred forty-seven million, seven hundred forty-six thousand, one hundred twenty-one".