21022020112211 has 4 divisors (see below), whose sum is σ = 22128442223400. Its totient is φ = 19915598001024.

The previous prime is 21022020112207. The next prime is 21022020112217. The reversal of 21022020112211 is 11221102022012.

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

It is a cyclic number.

It is not a de Polignac number, because 21022020112211 - 2² = 21022020112207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022020112211.

It is not an unprimeable number, because it can be changed into a prime (21022020112217) 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, 553211055566 + ... + 553211055603.

It is an arithmetic number, because the mean of its divisors is an integer number (5532110555850).

Almost surely, 2^{21022020112211} is an apocalyptic number.

21022020112211 is a deficient number, since it is larger than the sum of its proper divisors (1106422111189).

21022020112211 is a wasteful number, since it uses less digits than its factorization.

21022020112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106422111188.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21022020112211 its reverse (11221102022012), we get a palindrome (32243122134223).

The spelling of 21022020112211 in words is "twenty-one trillion, twenty-two billion, twenty million, one hundred twelve thousand, two hundred eleven".