121216020045 has 16 divisors (see below), whose sum is σ = 200201943552. Its totient is φ = 62563106880.

The previous prime is 121216020019. The next prime is 121216020049. The reversal of 121216020045 is 540020612121.

It is not a de Polignac number, because 121216020045 - 2¹³ = 121216011853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121216019997 and 121216020024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121216020049) 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, 130339342 + ... + 130340271.

It is an arithmetic number, because the mean of its divisors is an integer number (12512621472).

Almost surely, 2^121216020045 is an apocalyptic number.

121216020045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121216020045 is a deficient number, since it is larger than the sum of its proper divisors (78985923507).

121216020045 is a wasteful number, since it uses less digits than its factorization.

121216020045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260679652.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 121216020045 its reverse (540020612121), we get a palindrome (661236632166).

The spelling of 121216020045 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty thousand, forty-five".