20311034121 has 64 divisors (see below), whose sum is σ = 36955791360. Its totient is φ = 10760428800.

The previous prime is 20311034089. The next prime is 20311034137. The reversal of 20311034121 is 12143011302.

It is not a de Polignac number, because 20311034121 - 2⁵ = 20311034089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20311034094 and 20311034103.

It is not an unprimeable number, because it can be changed into a prime (20311034621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 168096 + ... + 262446.

It is an arithmetic number, because the mean of its divisors is an integer number (577434240).

Almost surely, 2^20311034121 is an apocalyptic number.

20311034121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20311034121 is a deficient number, since it is larger than the sum of its proper divisors (16644757239).

20311034121 is a wasteful number, since it uses less digits than its factorization.

20311034121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94451 (or 94445 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20311034121 its reverse (12143011302), we get a palindrome (32454045423).

The spelling of 20311034121 in words is "twenty billion, three hundred eleven million, thirty-four thousand, one hundred twenty-one".