11021000211221 has 32 divisors (see below), whose sum is σ = 15440793274368. Its totient is φ = 7582532379840.

The previous prime is 11021000211211. The next prime is 11021000211239. The reversal of 11021000211221 is 12211200012011.

It is not a de Polignac number, because 11021000211221 - 2⁴² = 6622953700117 is a prime.

It is a super-2 number, since 2×11021000211221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11021000211196 and 11021000211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021000211211) 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, 239324591 + ... + 239370636.

It is an arithmetic number, because the mean of its divisors is an integer number (482524789824).

Almost surely, 2^{11021000211221} is an apocalyptic number.

11021000211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11021000211221 is a deficient number, since it is larger than the sum of its proper divisors (4419793063147).

11021000211221 is a wasteful number, since it uses less digits than its factorization.

11021000211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478695281.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11021000211221 its reverse (12211200012011), we get a palindrome (23232200223232).

The spelling of 11021000211221 in words is "eleven trillion, twenty-one billion, two hundred eleven thousand, two hundred twenty-one".