20020013121 has 4 divisors (see below), whose sum is σ = 26693350832. Its totient is φ = 13346675412.

The previous prime is 20020013113. The next prime is 20020013137. The reversal of 20020013121 is 12131002002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20020013121 - 2³ = 20020013113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020013097 and 20020013106.

It is not an unprimeable number, because it can be changed into a prime (20020014121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336668851 + ... + 3336668856.

It is an arithmetic number, because the mean of its divisors is an integer number (6673337708).

Almost surely, 2^20020013121 is an apocalyptic number.

It is an amenable number.

20020013121 is a deficient number, since it is larger than the sum of its proper divisors (6673337711).

20020013121 is an equidigital number, since it uses as much as digits as its factorization.

20020013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673337710.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20020013121 its reverse (12131002002), we get a palindrome (32151015123).

The spelling of 20020013121 in words is "twenty billion, twenty million, thirteen thousand, one hundred twenty-one".