121220022066 has 128 divisors (see below), whose sum is σ = 297991249920. Its totient is φ = 32348025600.

The previous prime is 121220021999. The next prime is 121220022067. The reversal of 121220022066 is 660220022121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121220022067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7668631 + ... + 7684421.

It is an arithmetic number, because the mean of its divisors is an integer number (2328056640).

Almost surely, 2^121220022066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121220022066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148995624960).

121220022066 is an abundant number, since it is smaller than the sum of its proper divisors (176771227854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121220022066 is a wasteful number, since it uses less digits than its factorization.

121220022066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16232.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 121220022066 its reverse (660220022121), we get a palindrome (781440044187).

The spelling of 121220022066 in words is "one hundred twenty-one billion, two hundred twenty million, twenty-two thousand, sixty-six".