20020101121 has 16 divisors (see below), whose sum is σ = 20887891200. Its totient is φ = 19181526000.

The previous prime is 20020101113. The next prime is 20020101131. The reversal of 20020101121 is 12110102002.

It is not a de Polignac number, because 20020101121 - 2³ = 20020101113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020101098 and 20020101107.

It is not an unprimeable number, because it can be changed into a prime (20020101131) 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, 4211496 + ... + 4216246.

It is an arithmetic number, because the mean of its divisors is an integer number (1305493200).

Almost surely, 2^20020101121 is an apocalyptic number.

It is an amenable number.

20020101121 is a deficient number, since it is larger than the sum of its proper divisors (867790079).

20020101121 is an frugal number, since it uses more digits than its factorization.

20020101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933 (or 4847 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20020101121 its reverse (12110102002), we get a palindrome (32130203123).

The spelling of 20020101121 in words is "twenty billion, twenty million, one hundred one thousand, one hundred twenty-one".