21022200121111 has 16 divisors (see below), whose sum is σ = 24434888486400. Its totient is φ = 17711948667168.

The previous prime is 21022200121081. The next prime is 21022200121157. The reversal of 21022200121111 is 11112100222012.

It is not a de Polignac number, because 21022200121111 - 2¹³ = 21022200112919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022200121411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1985110 + ... + 6781228.

It is an arithmetic number, because the mean of its divisors is an integer number (1527180530400).

Almost surely, 2^{21022200121111} is an apocalyptic number.

21022200121111 is a deficient number, since it is larger than the sum of its proper divisors (3412688365289).

21022200121111 is a wasteful number, since it uses less digits than its factorization.

21022200121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806798.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21022200121111 its reverse (11112100222012), we get a palindrome (32134300343123).

The spelling of 21022200121111 in words is "twenty-one trillion, twenty-two billion, two hundred million, one hundred twenty-one thousand, one hundred eleven".