221102021011 has 4 divisors (see below), whose sum is σ = 221653398024. Its totient is φ = 220550644000.

The previous prime is 221102021003. The next prime is 221102021033. The reversal of 221102021011 is 110120201122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110120201122 = 2 ⋅55060100561.

It is a cyclic number.

It is not a de Polignac number, because 221102021011 - 2³ = 221102021003 is a prime.

It is a super-2 number, since 2×221102021011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221102020982 and 221102021000.

It is not an unprimeable number, because it can be changed into a prime (221102021411) 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, 275687905 + ... + 275688706.

It is an arithmetic number, because the mean of its divisors is an integer number (55413349506).

Almost surely, 2^221102021011 is an apocalyptic number.

221102021011 is a deficient number, since it is larger than the sum of its proper divisors (551377013).

221102021011 is an equidigital number, since it uses as much as digits as its factorization.

221102021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551377012.

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

Adding to 221102021011 its reverse (110120201122), we get a palindrome (331222222133).

The spelling of 221102021011 in words is "two hundred twenty-one billion, one hundred two million, twenty-one thousand, eleven".