121220021210110 has 16 divisors (see below), whose sum is σ = 218196304070256. Its totient is φ = 48487949396928.

The previous prime is 121220021210087. The next prime is 121220021210117. The reversal of 121220021210110 is 11012120022121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220021210117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1771234 + ... + 15670906.

It is an arithmetic number, because the mean of its divisors is an integer number (13637269004391).

Almost surely, 2^{121220021210110} is an apocalyptic number.

121220021210110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220021210110 is a deficient number, since it is larger than the sum of its proper divisors (96976282860146).

121220021210110 is a wasteful number, since it uses less digits than its factorization.

121220021210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14771787.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121220021210110 its reverse (11012120022121), we get a palindrome (132232141232231).

The spelling of 121220021210110 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-one million, two hundred ten thousand, one hundred ten".