121220222011 has 8 divisors (see below), whose sum is σ = 138539982560. Its totient is φ = 103901107968.

The previous prime is 121220221961. The next prime is 121220222023. The reversal of 121220222011 is 110222022121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121220222011 - 2¹⁷ = 121220090939 is a prime.

It is a super-2 number, since 2×121220222011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121220228011) 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 7 ways as a sum of consecutive naturals, for example, 346795 + ... + 602251.

It is an arithmetic number, because the mean of its divisors is an integer number (17317497820).

Almost surely, 2^121220222011 is an apocalyptic number.

121220222011 is a deficient number, since it is larger than the sum of its proper divisors (17319760549).

121220222011 is an equidigital number, since it uses as much as digits as its factorization.

121220222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323253.

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

Adding to 121220222011 its reverse (110222022121), we get a palindrome (231442244132).

The spelling of 121220222011 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, eleven".