21000022200111 has 4 divisors (see below), whose sum is σ = 28000029600152. Its totient is φ = 14000014800072.

The previous prime is 21000022200103. The next prime is 21000022200119. The reversal of 21000022200111 is 11100222000012.

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

It is an interprime number because it is at equal distance from previous prime (21000022200103) and next prime (21000022200119).

It is not a de Polignac number, because 21000022200111 - 2³ = 21000022200103 is a prime.

It is a super-3 number, since 3×21000022200111³ (a number of 41 digits) contains 333 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 (21000022200119) 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, 3500003700016 + ... + 3500003700021.

It is an arithmetic number, because the mean of its divisors is an integer number (7000007400038).

Almost surely, 2^{21000022200111} is an apocalyptic number.

21000022200111 is a deficient number, since it is larger than the sum of its proper divisors (7000007400041).

21000022200111 is an equidigital number, since it uses as much as digits as its factorization.

21000022200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000007400040.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000022200111 its reverse (11100222000012), we get a palindrome (32100244200123).

The spelling of 21000022200111 in words is "twenty-one trillion, twenty-two million, two hundred thousand, one hundred eleven".