221010021211 has 64 divisors (see below), whose sum is σ = 284307978240. Its totient is φ = 167359610880.

The previous prime is 221010021187. The next prime is 221010021247. The reversal of 221010021211 is 112120010122.

It is not a de Polignac number, because 221010021211 - 2⁷ = 221010021083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221010021191 and 221010021200.

It is not an unprimeable number, because it can be changed into a prime (221010021251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51527355 + ... + 51531643.

It is an arithmetic number, because the mean of its divisors is an integer number (4442312160).

Almost surely, 2^221010021211 is an apocalyptic number.

221010021211 is a deficient number, since it is larger than the sum of its proper divisors (63297957029).

221010021211 is a wasteful number, since it uses less digits than its factorization.

221010021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221010021211 its reverse (112120010122), we get a palindrome (333130031333).

The spelling of 221010021211 in words is "two hundred twenty-one billion, ten million, twenty-one thousand, two hundred eleven".