11021011121221 has 16 divisors (see below), whose sum is σ = 11409472013760. Its totient is φ = 10633114840320.

The previous prime is 11021011121209. The next prime is 11021011121287. The reversal of 11021011121221 is 12212111012011.

It is a cyclic number.

It is not a de Polignac number, because 11021011121221 - 2²⁵ = 11020977566789 is a prime.

It is a super-2 number, since 2×11021011121221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11021011121195 and 11021011121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021011121201) 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, 242939581 + ... + 242984941.

It is an arithmetic number, because the mean of its divisors is an integer number (713092000860).

Almost surely, 2^{11021011121221} is an apocalyptic number.

It is an amenable number.

11021011121221 is a deficient number, since it is larger than the sum of its proper divisors (388460892539).

11021011121221 is a wasteful number, since it uses less digits than its factorization.

11021011121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51396.

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

Adding to 11021011121221 its reverse (12212111012011), we get a palindrome (23233122133232).

The spelling of 11021011121221 in words is "eleven trillion, twenty-one billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".