210221022021009 has 8 divisors (see below), whose sum is σ = 281292186050592. Its totient is φ = 139648603002720.

The previous prime is 210221022020993. The next prime is 210221022021013. The reversal of 210221022021009 is 900120220122012.

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

It is not a de Polignac number, because 210221022021009 - 2⁴ = 210221022020993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210221022021009.

It is not an unprimeable number, because it can be changed into a prime (210221022071009) 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, 124686251839 + ... + 124686253524.

It is an arithmetic number, because the mean of its divisors is an integer number (35161523256324).

Almost surely, 2^{210221022021009} is an apocalyptic number.

It is an amenable number.

210221022021009 is a deficient number, since it is larger than the sum of its proper divisors (71071164029583).

210221022021009 is a wasteful number, since it uses less digits than its factorization.

210221022021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249372505647.

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

The spelling of 210221022021009 in words is "two hundred ten trillion, two hundred twenty-one billion, twenty-two million, twenty-one thousand, nine".