20121121110 has 16 divisors (see below), whose sum is σ = 48290690736. Its totient is φ = 5365632288.

The previous prime is 20121121067. The next prime is 20121121151. The reversal of 20121121110 is 1112112102.

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, 335351989 + ... + 335352048.

It is an arithmetic number, because the mean of its divisors is an integer number (3018168171).

Almost surely, 2^20121121110 is an apocalyptic number.

20121121110 is an abundant number, since it is smaller than the sum of its proper divisors (28169569626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121121110 is a wasteful number, since it uses less digits than its factorization.

20121121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670704047.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20121121110 its reverse (1112112102), we get a palindrome (21233233212).

The spelling of 20121121110 in words is "twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred ten".