20310110121 has 16 divisors (see below), whose sum is σ = 31087529984. Its totient is φ = 11553730704.

The previous prime is 20310110113. The next prime is 20310110143. The reversal of 20310110121 is 12101101302.

It is not a de Polignac number, because 20310110121 - 2³ = 20310110113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20310110097 and 20310110106.

It is not an unprimeable number, because it can be changed into a prime (20310110101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2163811 + ... + 2173176.

It is an arithmetic number, because the mean of its divisors is an integer number (1942970624).

Almost surely, 2^20310110121 is an apocalyptic number.

20310110121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20310110121 is a deficient number, since it is larger than the sum of its proper divisors (10777419863).

20310110121 is a wasteful number, since it uses less digits than its factorization.

20310110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337220.

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

Adding to 20310110121 its reverse (12101101302), we get a palindrome (32411211423).

The spelling of 20310110121 in words is "twenty billion, three hundred ten million, one hundred ten thousand, one hundred twenty-one".