21312102201 has 32 divisors (see below), whose sum is σ = 31426257408. Its totient is φ = 12764977920.

The previous prime is 21312102199. The next prime is 21312102221. The reversal of 21312102201 is 10220121312.

It is not a de Polignac number, because 21312102201 - 2¹ = 21312102199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21312102221) 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, 299655 + ... + 363891.

It is an arithmetic number, because the mean of its divisors is an integer number (982070544).

Almost surely, 2^21312102201 is an apocalyptic number.

It is an amenable number.

21312102201 is a deficient number, since it is larger than the sum of its proper divisors (10114155207).

21312102201 is a wasteful number, since it uses less digits than its factorization.

21312102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64481.

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

Adding to 21312102201 its reverse (10220121312), we get a palindrome (31532223513).

The spelling of 21312102201 in words is "twenty-one billion, three hundred twelve million, one hundred two thousand, two hundred one".