21213332101 has 16 divisors (see below), whose sum is σ = 23909243904. Its totient is φ = 18674498304.

The previous prime is 21213332047. The next prime is 21213332111. The reversal of 21213332101 is 10123331212.

It is a cyclic number.

It is not a de Polignac number, because 21213332101 - 2¹³ = 21213323909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213332111) 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, 4501 + ... + 206026.

It is an arithmetic number, because the mean of its divisors is an integer number (1494327744).

Almost surely, 2^21213332101 is an apocalyptic number.

It is an amenable number.

21213332101 is a deficient number, since it is larger than the sum of its proper divisors (2695911803).

21213332101 is a wasteful number, since it uses less digits than its factorization.

21213332101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210900.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21213332101 its reverse (10123331212), we get a palindrome (31336663313).

The spelling of 21213332101 in words is "twenty-one billion, two hundred thirteen million, three hundred thirty-two thousand, one hundred one".