11122121122021 has 16 divisors (see below), whose sum is σ = 13689323149824. Its totient is φ = 8799560849664.

The previous prime is 11122121122019. The next prime is 11122121122037. The reversal of 11122121122021 is 12022112122111.

It is a happy number.

It is not a de Polignac number, because 11122121122021 - 2¹ = 11122121122019 is a prime.

It is a super-2 number, since 2×11122121122021² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11122121122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122121122621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241156 + ... + 4722541.

It is an arithmetic number, because the mean of its divisors is an integer number (855582696864).

Almost surely, 2^{11122121122021} is an apocalyptic number.

It is an amenable number.

11122121122021 is a deficient number, since it is larger than the sum of its proper divisors (2567202027803).

11122121122021 is a wasteful number, since it uses less digits than its factorization.

11122121122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988340.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11122121122021 its reverse (12022112122111), we get a palindrome (23144233244132).

The spelling of 11122121122021 in words is "eleven trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, twenty-one".