121220022211 has 16 divisors (see below), whose sum is σ = 128933164800. Its totient is φ = 113645095200.

The previous prime is 121220022199. The next prime is 121220022239. The reversal of 121220022211 is 112220022121.

It is a happy number.

It is not a de Polignac number, because 121220022211 - 2²³ = 121211633603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220022241) 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, 825721 + ... + 961381.

It is an arithmetic number, because the mean of its divisors is an integer number (8058322800).

Almost surely, 2^121220022211 is an apocalyptic number.

121220022211 is a deficient number, since it is larger than the sum of its proper divisors (7713142589).

121220022211 is a wasteful number, since it uses less digits than its factorization.

121220022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136170.

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

Adding to 121220022211 its reverse (112220022121), we get a palindrome (233440044332).

The spelling of 121220022211 in words is "one hundred twenty-one billion, two hundred twenty million, twenty-two thousand, two hundred eleven".