11121201222021 has 72 divisors (see below), whose sum is σ = 17695833978368. Its totient is φ = 6725340705600.

The previous prime is 11121201222017. The next prime is 11121201222029. The reversal of 11121201222021 is 12022210212111.

It is not a de Polignac number, because 11121201222021 - 2² = 11121201222017 is a prime.

It is a super-2 number, since 2×11121201222021² (a number of 27 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 = 11121201221985 and 11121201222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121201222029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1590784836 + ... + 1590791826.

Almost surely, 2^{11121201222021} is an apocalyptic number.

11121201222021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11121201222021 is a deficient number, since it is larger than the sum of its proper divisors (6574632756347).

11121201222021 is a wasteful number, since it uses less digits than its factorization.

11121201222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10015 (or 10001 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11121201222021 its reverse (12022210212111), we get a palindrome (23143411434132).

The spelling of 11121201222021 in words is "eleven trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, twenty-one".