121760820218 has 16 divisors (see below), whose sum is σ = 192279385440. Its totient is φ = 57668540400.

The previous prime is 121760820191. The next prime is 121760820221. The reversal of 121760820218 is 812028067121.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83948 + ... + 500568.

It is an arithmetic number, because the mean of its divisors is an integer number (12017461590).

Almost surely, 2^121760820218 is an apocalyptic number.

121760820218 is a deficient number, since it is larger than the sum of its proper divisors (70518565222).

121760820218 is a wasteful number, since it uses less digits than its factorization.

121760820218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424333.

The product of its (nonzero) digits is 21504, while the sum is 38.

Adding to 121760820218 its reverse (812028067121), we get a palindrome (933788887339).

The spelling of 121760820218 in words is "one hundred twenty-one billion, seven hundred sixty million, eight hundred twenty thousand, two hundred eighteen".