121216020027 has 16 divisors (see below), whose sum is σ = 163664837280. Its totient is φ = 79792791552.

The previous prime is 121216020019. The next prime is 121216020049. The reversal of 121216020027 is 720020612121.

It is not a de Polignac number, because 121216020027 - 2³ = 121216020019 is a prime.

It is a super-2 number, since 2×121216020027² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121216019979 and 121216020006.

It is not an unprimeable number, because it can be changed into a prime (121216020067) 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 15 ways as a sum of consecutive naturals, for example, 355002 + ... + 607007.

It is an arithmetic number, because the mean of its divisors is an integer number (10229052330).

Almost surely, 2^121216020027 is an apocalyptic number.

121216020027 is a deficient number, since it is larger than the sum of its proper divisors (42448817253).

121216020027 is an equidigital number, since it uses as much as digits as its factorization.

121216020027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962542.

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 121216020027 its reverse (720020612121), we get a palindrome (841236632148).

The spelling of 121216020027 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty thousand, twenty-seven".