20010110111121 has 32 divisors (see below), whose sum is σ = 30423663760000. Its totient is φ = 11665813109184.

The previous prime is 20010110111113. The next prime is 20010110111177. The reversal of 20010110111121 is 12111101101002.

It is not a de Polignac number, because 20010110111121 - 2³ = 20010110111113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010110111097 and 20010110111106.

It is not an unprimeable number, because it can be changed into a prime (20010110111021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79768846 + ... + 80019303.

It is an arithmetic number, because the mean of its divisors is an integer number (950739492500).

Almost surely, 2^{20010110111121} is an apocalyptic number.

It is an amenable number.

20010110111121 is a deficient number, since it is larger than the sum of its proper divisors (10413553648879).

20010110111121 is a wasteful number, since it uses less digits than its factorization.

20010110111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159788210 (or 159788184 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 20010110111121 its reverse (12111101101002), we get a palindrome (32121211212123).

The spelling of 20010110111121 in words is "twenty trillion, ten billion, one hundred ten million, one hundred eleven thousand, one hundred twenty-one".