21200102020111 has 8 divisors (see below), whose sum is σ = 24277242512000. Its totient is φ = 18135100150488.

The previous prime is 21200102019997. The next prime is 21200102020147. The reversal of 21200102020111 is 11102020100212.

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 21200102020111 - 2¹¹ = 21200102018063 is a prime.

It is a super-2 number, since 2×21200102020111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200102020091 and 21200102020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200102620111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3034651821 + ... + 3034658806.

It is an arithmetic number, because the mean of its divisors is an integer number (3034655314000).

Almost surely, 2^{21200102020111} is an apocalyptic number.

21200102020111 is a deficient number, since it is larger than the sum of its proper divisors (3077140491889).

21200102020111 is an equidigital number, since it uses as much as digits as its factorization.

21200102020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6069311133.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200102020111 its reverse (11102020100212), we get a palindrome (32302122120323).

The spelling of 21200102020111 in words is "twenty-one trillion, two hundred billion, one hundred two million, twenty thousand, one hundred eleven".