21213202101 has 32 divisors (see below), whose sum is σ = 34839840000. Its totient is φ = 11180242944.

The previous prime is 21213202091. The next prime is 21213202103. The reversal of 21213202101 is 10120231212.

It is not a de Polignac number, because 21213202101 - 2⁶ = 21213202037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213202103) 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 31 ways as a sum of consecutive naturals, for example, 309871 + ... + 372083.

It is an arithmetic number, because the mean of its divisors is an integer number (1088745000).

Almost surely, 2^21213202101 is an apocalyptic number.

21213202101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21213202101 is a deficient number, since it is larger than the sum of its proper divisors (13626637899).

21213202101 is a wasteful number, since it uses less digits than its factorization.

21213202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63485.

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

Adding to 21213202101 its reverse (10120231212), we get a palindrome (31333433313).

The spelling of 21213202101 in words is "twenty-one billion, two hundred thirteen million, two hundred two thousand, one hundred one".