121406073646 has 24 divisors (see below), whose sum is σ = 215121903624. Its totient is φ = 50939609760.

The previous prime is 121406073641. The next prime is 121406073647. The reversal of 121406073646 is 646370604121.

It is a junction number, because it is equal to n+sod(n) for n = 121406073599 and 121406073608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121406073641) 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 11 ways as a sum of consecutive naturals, for example, 16323081 + ... + 16330516.

It is an arithmetic number, because the mean of its divisors is an integer number (8963412651).

Almost surely, 2^121406073646 is an apocalyptic number.

121406073646 is a deficient number, since it is larger than the sum of its proper divisors (93715829978).

121406073646 is a wasteful number, since it uses less digits than its factorization.

121406073646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32653636 (or 32653623 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

Adding to 121406073646 its reverse (646370604121), we get a palindrome (767776677767).

The spelling of 121406073646 in words is "one hundred twenty-one billion, four hundred six million, seventy-three thousand, six hundred forty-six".