210002021101221 has 16 divisors (see below), whose sum is σ = 287589335344704. Its totient is φ = 136208527133184.

The previous prime is 210002021101211. The next prime is 210002021101253. The reversal of 210002021101221 is 122101120200012.

It is not a de Polignac number, because 210002021101221 - 2¹⁷ = 210002020970149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210002021101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002021101211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60812695 + ... + 64173108.

It is an arithmetic number, because the mean of its divisors is an integer number (17974333459044).

Almost surely, 2^{210002021101221} is an apocalyptic number.

It is an amenable number.

210002021101221 is a deficient number, since it is larger than the sum of its proper divisors (77587314243483).

210002021101221 is a wasteful number, since it uses less digits than its factorization.

210002021101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125000980.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210002021101221 its reverse (122101120200012), we get a palindrome (332103141301233).

The spelling of 210002021101221 in words is "two hundred ten trillion, two billion, twenty-one million, one hundred one thousand, two hundred twenty-one".