121220201108 has 48 divisors (see below), whose sum is σ = 220381045248. Its totient is φ = 58279824000.

The previous prime is 121220201107. The next prime is 121220201119. The reversal of 121220201108 is 801102022121.

It is a self number, because there is not a number n which added to its sum of digits gives 121220201108.

It is a congruent number.

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, 43337966 + ... + 43340762.

It is an arithmetic number, because the mean of its divisors is an integer number (4591271776).

Almost surely, 2^121220201108 is an apocalyptic number.

It is an amenable number.

121220201108 is a deficient number, since it is larger than the sum of its proper divisors (99160844140).

121220201108 is a wasteful number, since it uses less digits than its factorization.

121220201108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944 (or 4942 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121220201108 its reverse (801102022121), we get a palindrome (922322223229).

The spelling of 121220201108 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred one thousand, one hundred eight".