221021101120210 has 8 divisors (see below), whose sum is σ = 397837982016396. Its totient is φ = 88408440448080.

The previous prime is 221021101120151. The next prime is 221021101120219. The reversal of 221021101120210 is 12021101120122.

It can be written as a sum of positive squares in 2 ways, for example, as 202409719963929 + 18611381156281 = 14227077^2 + 4314091^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221021101120219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11051055056001 + ... + 11051055056020.

Almost surely, 2^{221021101120210} is an apocalyptic number.

221021101120210 is a deficient number, since it is larger than the sum of its proper divisors (176816880896186).

221021101120210 is a wasteful number, since it uses less digits than its factorization.

221021101120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22102110112028.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221021101120210 its reverse (12021101120122), we get a palindrome (233042202240332).

The spelling of 221021101120210 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred one million, one hundred twenty thousand, two hundred ten".