20020121011 has 8 divisors (see below), whose sum is σ = 21842827200. Its totient is φ = 18197864040.

The previous prime is 20020120997. The next prime is 20020121057. The reversal of 20020121011 is 11012102002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20020121011 - 2²⁷ = 19885903283 is a prime.

It is a super-3 number, since 3×20020121011³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020121071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15481 + ... + 200698.

It is an arithmetic number, because the mean of its divisors is an integer number (2730353400).

Almost surely, 2^20020121011 is an apocalyptic number.

20020121011 is a deficient number, since it is larger than the sum of its proper divisors (1822706189).

20020121011 is a wasteful number, since it uses less digits than its factorization.

20020121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224609.

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

Adding to 20020121011 its reverse (11012102002), we get a palindrome (31032223013).

The spelling of 20020121011 in words is "twenty billion, twenty million, one hundred twenty-one thousand, eleven".