121221020202110 has 16 divisors (see below), whose sum is σ = 218197967904576. Its totient is φ = 48488378849568.

The previous prime is 121221020202089. The next prime is 121221020202133. The reversal of 121221020202110 is 11202020122121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23072024 + ... + 27834516.

It is an arithmetic number, because the mean of its divisors is an integer number (13637372994036).

Almost surely, 2^{121221020202110} is an apocalyptic number.

121221020202110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221020202110 is a deficient number, since it is larger than the sum of its proper divisors (96976947702466).

121221020202110 is a wasteful number, since it uses less digits than its factorization.

121221020202110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7307827.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121221020202110 its reverse (11202020122121), we get a palindrome (132423040324231).

The spelling of 121221020202110 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred two thousand, one hundred ten".