21202223111 has 8 divisors (see below), whose sum is σ = 21929693184. Its totient is φ = 20477473560.

The previous prime is 21202223087. The next prime is 21202223117. The reversal of 21202223111 is 11132220212.

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 21202223111 - 2¹⁰ = 21202222087 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 21202223111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202223117) 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, 664271 + ... + 695456.

It is an arithmetic number, because the mean of its divisors is an integer number (2741211648).

Almost surely, 2^21202223111 is an apocalyptic number.

21202223111 is a deficient number, since it is larger than the sum of its proper divisors (727470073).

21202223111 is a wasteful number, since it uses less digits than its factorization.

21202223111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360261.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21202223111 its reverse (11132220212), we get a palindrome (32334443323).

The spelling of 21202223111 in words is "twenty-one billion, two hundred two million, two hundred twenty-three thousand, one hundred eleven".