21222213201 has 48 divisors (see below), whose sum is σ = 35914409856. Its totient is φ = 11824869888.

The previous prime is 21222213161. The next prime is 21222213241. The reversal of 21222213201 is 10231222212.

21222213201 is a `hidden beast` number, since 2 + 122 + 221 + 320 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21222213161) and next prime (21222213241).

It is not a de Polignac number, because 21222213201 - 2¹³ = 21222205009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222213241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 524761 + ... + 563753.

It is an arithmetic number, because the mean of its divisors is an integer number (748216872).

Almost surely, 2^21222213201 is an apocalyptic number.

21222213201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21222213201 is a deficient number, since it is larger than the sum of its proper divisors (14692196655).

21222213201 is a wasteful number, since it uses less digits than its factorization.

21222213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39222 (or 39219 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21222213201 its reverse (10231222212), we get a palindrome (31453435413).

The spelling of 21222213201 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirteen thousand, two hundred one".