21032221111 has 8 divisors (see below), whose sum is σ = 22968328464. Its totient is φ = 19100128320.

The previous prime is 21032221079. The next prime is 21032221117. The reversal of 21032221111 is 11112223012.

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 21032221111 - 2⁵ = 21032221079 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 (21032221117) 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, 992676 + ... + 1013641.

It is an arithmetic number, because the mean of its divisors is an integer number (2871041058).

Almost surely, 2^21032221111 is an apocalyptic number.

21032221111 is a deficient number, since it is larger than the sum of its proper divisors (1936107353).

21032221111 is a wasteful number, since it uses less digits than its factorization.

21032221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007281.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21032221111 its reverse (11112223012), we get a palindrome (32144444123).

The spelling of 21032221111 in words is "twenty-one billion, thirty-two million, two hundred twenty-one thousand, one hundred eleven".