21220220200111 has 8 divisors (see below), whose sum is σ = 21233761472624. Its totient is φ = 21206683189440.

The previous prime is 21220220200097. The next prime is 21220220200121. The reversal of 21220220200111 is 11100202202212.

It is a happy number.

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 21220220200111 - 2⁹ = 21220220199599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220220200121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8925811 + ... + 11050363.

It is an arithmetic number, because the mean of its divisors is an integer number (2654220184078).

Almost surely, 2^{21220220200111} is an apocalyptic number.

21220220200111 is a deficient number, since it is larger than the sum of its proper divisors (13541272513).

21220220200111 is a wasteful number, since it uses less digits than its factorization.

21220220200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130921.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220220200111 its reverse (11100202202212), we get a palindrome (32320422402323).

The spelling of 21220220200111 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty million, two hundred thousand, one hundred eleven".