211100220010221 has 32 divisors (see below), whose sum is σ = 293801587568640. Its totient is φ = 134570212920000.

The previous prime is 211100220010219. The next prime is 211100220010243. The reversal of 211100220010221 is 122010022001112.

It is not a de Polignac number, because 211100220010221 - 2¹ = 211100220010219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211100220010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100220010271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2788272915 + ... + 2788348623.

It is an arithmetic number, because the mean of its divisors is an integer number (9181299611520).

Almost surely, 2^{211100220010221} is an apocalyptic number.

It is an amenable number.

211100220010221 is a deficient number, since it is larger than the sum of its proper divisors (82701367558419).

211100220010221 is a wasteful number, since it uses less digits than its factorization.

211100220010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88537.

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

Adding to 211100220010221 its reverse (122010022001112), we get a palindrome (333110242011333).

The spelling of 211100220010221 in words is "two hundred eleven trillion, one hundred billion, two hundred twenty million, ten thousand, two hundred twenty-one".