121220122210 has 16 divisors (see below), whose sum is σ = 238032240192. Its totient is φ = 44080044400.

The previous prime is 121220122207. The next prime is 121220122211. The reversal of 121220122210 is 12221022121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121220122211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551000446 + ... + 551000665.

It is an arithmetic number, because the mean of its divisors is an integer number (14877015012).

Almost surely, 2^121220122210 is an apocalyptic number.

121220122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220122210 is a deficient number, since it is larger than the sum of its proper divisors (116812117982).

121220122210 is a wasteful number, since it uses less digits than its factorization.

121220122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102001129.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121220122210 its reverse (12221022121), we get a palindrome (133441144331).

The spelling of 121220122210 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred ten".