21222001210209 has 8 divisors (see below), whose sum is σ = 28469596716192. Its totient is φ = 14061203255520.

The previous prime is 21222001210199. The next prime is 21222001210217. The reversal of 21222001210209 is 90201210022212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21222001210209 - 2¹² = 21222001206113 is a prime.

It is a super-2 number, since 2×21222001210209² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222001210219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21699387252 + ... + 21699388229.

It is an arithmetic number, because the mean of its divisors is an integer number (3558699589524).

Almost surely, 2^{21222001210209} is an apocalyptic number.

It is an amenable number.

21222001210209 is a deficient number, since it is larger than the sum of its proper divisors (7247595505983).

21222001210209 is a wasteful number, since it uses less digits than its factorization.

21222001210209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43398775647.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 21222001210209 in words is "twenty-one trillion, two hundred twenty-two billion, one million, two hundred ten thousand, two hundred nine".