21000201120111 has 4 divisors (see below), whose sum is σ = 28000268160152. Its totient is φ = 14000134080072.

The previous prime is 21000201120103. The next prime is 21000201120149. The reversal of 21000201120111 is 11102110200012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21000201120111 - 2³ = 21000201120103 is a prime.

It is a super-2 number, since 2×21000201120111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000201120911) 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, 3500033520016 + ... + 3500033520021.

It is an arithmetic number, because the mean of its divisors is an integer number (7000067040038).

Almost surely, 2^{21000201120111} is an apocalyptic number.

21000201120111 is a deficient number, since it is larger than the sum of its proper divisors (7000067040041).

21000201120111 is an equidigital number, since it uses as much as digits as its factorization.

21000201120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000067040040.

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

Adding to 21000201120111 its reverse (11102110200012), we get a palindrome (32102311320123).

The spelling of 21000201120111 in words is "twenty-one trillion, two hundred one million, one hundred twenty thousand, one hundred eleven".