20120121110 has 16 divisors (see below), whose sum is σ = 36224042400. Its totient is φ = 8046309696.

The previous prime is 20120121071. The next prime is 20120121137. The reversal of 20120121110 is 1112102102.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20120121091 and 20120121100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168215 + ... + 261794.

It is an arithmetic number, because the mean of its divisors is an integer number (2264002650).

Almost surely, 2^20120121110 is an apocalyptic number.

20120121110 is a deficient number, since it is larger than the sum of its proper divisors (16103921290).

20120121110 is a wasteful number, since it uses less digits than its factorization.

20120121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434695.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20120121110 its reverse (1112102102), we get a palindrome (21232223212).

The spelling of 20120121110 in words is "twenty billion, one hundred twenty million, one hundred twenty-one thousand, one hundred ten".