11021222020121 has 4 divisors (see below), whose sum is σ = 11021649705744. Its totient is φ = 11020794334500.

The previous prime is 11021222020091. The next prime is 11021222020141. The reversal of 11021222020121 is 12102022212011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11021222020121 - 2¹⁸ = 11021221757977 is a prime.

It is a super-2 number, since 2×11021222020121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11021222020121.

It is not an unprimeable number, because it can be changed into a prime (11021222020141) 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, 213804155 + ... + 213855696.

It is an arithmetic number, because the mean of its divisors is an integer number (2755412426436).

Almost surely, 2^{11021222020121} is an apocalyptic number.

It is an amenable number.

11021222020121 is a deficient number, since it is larger than the sum of its proper divisors (427685623).

11021222020121 is an equidigital number, since it uses as much as digits as its factorization.

11021222020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427685622.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11021222020121 its reverse (12102022212011), we get a palindrome (23123244232132).

The spelling of 11021222020121 in words is "eleven trillion, twenty-one billion, two hundred twenty-two million, twenty thousand, one hundred twenty-one".