121220201106 has 32 divisors (see below), whose sum is σ = 269826513600. Its totient is φ = 40339490400.

The previous prime is 121220201041. The next prime is 121220201107. The reversal of 121220201106 is 601102022121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121220201107) 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, 1835116 + ... + 1900023.

It is an arithmetic number, because the mean of its divisors is an integer number (8432078550).

Almost surely, 2^121220201106 is an apocalyptic number.

121220201106 is an abundant number, since it is smaller than the sum of its proper divisors (148606312494).

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

121220201106 is a wasteful number, since it uses less digits than its factorization.

121220201106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3735751 (or 3735745 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121220201106 its reverse (601102022121), we get a palindrome (722322223227).

The spelling of 121220201106 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred one thousand, one hundred six".