20021101033021 has 24 divisors (see below), whose sum is σ = 22529845134720. Its totient is φ = 17770189145280.

The previous prime is 20021101033009. The next prime is 20021101033039. The reversal of 20021101033021 is 12033010112002.

It is not a de Polignac number, because 20021101033021 - 2²⁵ = 20021067478589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20021101032986 and 20021101033004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021101033321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1977811 + ... + 6629776.

It is an arithmetic number, because the mean of its divisors is an integer number (938743547280).

Almost surely, 2^{20021101033021} is an apocalyptic number.

It is an amenable number.

20021101033021 is a deficient number, since it is larger than the sum of its proper divisors (2508744101699).

20021101033021 is a wasteful number, since it uses less digits than its factorization.

20021101033021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8608065 (or 8608054 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20021101033021 its reverse (12033010112002), we get a palindrome (32054111145023).

The spelling of 20021101033021 in words is "twenty trillion, twenty-one billion, one hundred one million, thirty-three thousand, twenty-one".