21201322101 has 16 divisors (see below), whose sum is σ = 28336846848. Its totient is φ = 14100044400.

The previous prime is 21201322069. The next prime is 21201322111. The reversal of 21201322101 is 10122310212.

It is not a de Polignac number, because 21201322101 - 2⁵ = 21201322069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201322111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2857086 + ... + 2864496.

It is an arithmetic number, because the mean of its divisors is an integer number (1771052928).

Almost surely, 2^21201322101 is an apocalyptic number.

It is an amenable number.

21201322101 is a deficient number, since it is larger than the sum of its proper divisors (7135524747).

21201322101 is a wasteful number, since it uses less digits than its factorization.

21201322101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9592.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21201322101 its reverse (10122310212), we get a palindrome (31323632313).

The spelling of 21201322101 in words is "twenty-one billion, two hundred one million, three hundred twenty-two thousand, one hundred one".