21322100111 has 32 divisors (see below), whose sum is σ = 25264705536. Its totient is φ = 17807040000.

The previous prime is 21322100101. The next prime is 21322100123. The reversal of 21322100111 is 11100122312.

It is a cyclic number.

It is not a de Polignac number, because 21322100111 - 2³⁰ = 20248358287 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 (21322100101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1024196 + ... + 1044806.

It is an arithmetic number, because the mean of its divisors is an integer number (789522048).

Almost surely, 2^21322100111 is an apocalyptic number.

21322100111 is a deficient number, since it is larger than the sum of its proper divisors (3942605425).

21322100111 is a wasteful number, since it uses less digits than its factorization.

21322100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20823.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21322100111 its reverse (11100122312), we get a palindrome (32422222423).

The spelling of 21322100111 in words is "twenty-one billion, three hundred twenty-two million, one hundred thousand, one hundred eleven".