21224201101 has 4 divisors (see below), whose sum is σ = 21225975804. Its totient is φ = 21222426400.

The previous prime is 21224201093. The next prime is 21224201111. The reversal of 21224201101 is 10110242212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6643880100 + 14580321001 = 81510^2 + 120749^2 .

It is a cyclic number.

It is not a de Polignac number, because 21224201101 - 2³ = 21224201093 is a prime.

It is a super-2 number, since 2×21224201101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224201111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869290 + ... + 893371.

It is an arithmetic number, because the mean of its divisors is an integer number (5306493951).

Almost surely, 2^21224201101 is an apocalyptic number.

It is an amenable number.

21224201101 is a deficient number, since it is larger than the sum of its proper divisors (1774703).

21224201101 is a wasteful number, since it uses less digits than its factorization.

21224201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774702.

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

Adding to 21224201101 its reverse (10110242212), we get a palindrome (31334443313).

The spelling of 21224201101 in words is "twenty-one billion, two hundred twenty-four million, two hundred one thousand, one hundred one".