20020120111021 has 16 divisors (see below), whose sum is σ = 22124971722240. Its totient is φ = 18030502741680.

The previous prime is 20020120110971. The next prime is 20020120111037. The reversal of 20020120111021 is 12011102102002.

It is a cyclic number.

It is not a de Polignac number, because 20020120111021 - 2¹¹ = 20020120108973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020120110992 and 20020120111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020120121021) 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, 140458315 + ... + 140600776.

It is an arithmetic number, because the mean of its divisors is an integer number (1382810732640).

Almost surely, 2^{20020120111021} is an apocalyptic number.

It is an amenable number.

20020120111021 is a deficient number, since it is larger than the sum of its proper divisors (2104851611219).

20020120111021 is a wasteful number, since it uses less digits than its factorization.

20020120111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281059296.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20020120111021 its reverse (12011102102002), we get a palindrome (32031222213023).

The spelling of 20020120111021 in words is "twenty trillion, twenty billion, one hundred twenty million, one hundred eleven thousand, twenty-one".