20010021211101 has 4 divisors (see below), whose sum is σ = 26680028281472. Its totient is φ = 13340014140732.

The previous prime is 20010021211069. The next prime is 20010021211121. The reversal of 20010021211101 is 10111212001002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20010021211101 - 2⁵ = 20010021211069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010021211121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335003535181 + ... + 3335003535186.

It is an arithmetic number, because the mean of its divisors is an integer number (6670007070368).

Almost surely, 2^{20010021211101} is an apocalyptic number.

It is an amenable number.

20010021211101 is a deficient number, since it is larger than the sum of its proper divisors (6670007070371).

20010021211101 is an equidigital number, since it uses as much as digits as its factorization.

20010021211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670007070370.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20010021211101 its reverse (10111212001002), we get a palindrome (30121233212103).

The spelling of 20010021211101 in words is "twenty trillion, ten billion, twenty-one million, two hundred eleven thousand, one hundred one".