20020011110021 has 8 divisors (see below), whose sum is σ = 21561754642680. Its totient is φ = 18478516531392.

The previous prime is 20020011109957. The next prime is 20020011110027. The reversal of 20020011110021 is 12001111002002.

It can be written as a sum of positive squares in 4 ways, for example, as 5681482219396 + 14338528890625 = 2383586^2 + 3786625^2 .

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 20020011110021 - 2⁶ = 20020011109957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020011109984 and 20020011110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020011110027) 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, 62071466 + ... + 62393163.

It is an arithmetic number, because the mean of its divisors is an integer number (2695219330335).

Almost surely, 2^{20020011110021} is an apocalyptic number.

It is an amenable number.

20020011110021 is a deficient number, since it is larger than the sum of its proper divisors (1541743532659).

20020011110021 is a wasteful number, since it uses less digits than its factorization.

20020011110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124477015.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20020011110021 its reverse (12001111002002), we get a palindrome (32021122112023).

The spelling of 20020011110021 in words is "twenty trillion, twenty billion, eleven million, one hundred ten thousand, twenty-one".