121001210218 has 32 divisors (see below), whose sum is σ = 208865802240. Its totient is φ = 51499076400.

The previous prime is 121001210203. The next prime is 121001210227. The reversal of 121001210218 is 812012100121.

It is a junction number, because it is equal to n+sod(n) for n = 121001210195 and 121001210204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9978363 + ... + 9990481.

It is an arithmetic number, because the mean of its divisors is an integer number (6527056320).

Almost surely, 2^121001210218 is an apocalyptic number.

121001210218 is a deficient number, since it is larger than the sum of its proper divisors (87864592022).

121001210218 is a wasteful number, since it uses less digits than its factorization.

121001210218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17002.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121001210218 its reverse (812012100121), we get a palindrome (933013310339).

The spelling of 121001210218 in words is "one hundred twenty-one billion, one million, two hundred ten thousand, two hundred eighteen".