121220201110 has 32 divisors (see below), whose sum is σ = 218521800000. Its totient is φ = 48415825920.

The previous prime is 121220201107. The next prime is 121220201119. The reversal of 121220201110 is 11102022121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220201119) 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 15 ways as a sum of consecutive naturals, for example, 24246391 + ... + 24251389.

It is an arithmetic number, because the mean of its divisors is an integer number (6828806250).

Almost surely, 2^121220201110 is an apocalyptic number.

121220201110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220201110 is a deficient number, since it is larger than the sum of its proper divisors (97301598890).

121220201110 is a wasteful number, since it uses less digits than its factorization.

121220201110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8136.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121220201110 its reverse (11102022121), we get a palindrome (132322223231).

The spelling of 121220201110 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred one thousand, one hundred ten".