20121111002120 has 32 divisors (see below), whose sum is σ = 45295376385600. Its totient is φ = 8044377444288.

The previous prime is 20121111002117. The next prime is 20121111002159. The reversal of 20121111002120 is 2120011112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121111002095 and 20121111002104.

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, 127012244 + ... + 127170563.

It is an arithmetic number, because the mean of its divisors is an integer number (1415480512050).

Almost surely, 2^{20121111002120} is an apocalyptic number.

20121111002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121111002120 is an abundant number, since it is smaller than the sum of its proper divisors (25174265383480).

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

20121111002120 is a wasteful number, since it uses less digits than its factorization.

20121111002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254184797 (or 254184793 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20121111002120 its reverse (2120011112102), we get a palindrome (22241122114222).

The spelling of 20121111002120 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, two thousand, one hundred twenty".