20011001101021 has 8 divisors (see below), whose sum is σ = 22869746889920. Its totient is φ = 17152263148608.

The previous prime is 20011001101009. The next prime is 20011001101043. The reversal of 20011001101021 is 12010110011002.

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

It is not a de Polignac number, because 20011001101021 - 2³⁵ = 19976641362653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011001100989 and 20011001101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011001101061) 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, 5311810 + ... + 8260588.

It is an arithmetic number, because the mean of its divisors is an integer number (2858718361240).

Almost surely, 2^{20011001101021} is an apocalyptic number.

It is an amenable number.

20011001101021 is a deficient number, since it is larger than the sum of its proper divisors (2858745788899).

20011001101021 is an equidigital number, since it uses as much as digits as its factorization.

20011001101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918243.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20011001101021 its reverse (12010110011002), we get a palindrome (32021111112023).

The spelling of 20011001101021 in words is "twenty trillion, eleven billion, one million, one hundred one thousand, twenty-one".