11221012121021 has 16 divisors (see below), whose sum is σ = 11806818120000. Its totient is φ = 10648530686976.

The previous prime is 11221012121009. The next prime is 11221012121041. The reversal of 11221012121021 is 12012121012211.

It is not a de Polignac number, because 11221012121021 - 2⁶ = 11221012120957 is a prime.

It is a super-2 number, since 2×11221012121021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221012121041) 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, 8939750 + ... + 10117368.

It is an arithmetic number, because the mean of its divisors is an integer number (737926132500).

Almost surely, 2^{11221012121021} is an apocalyptic number.

It is an amenable number.

11221012121021 is a deficient number, since it is larger than the sum of its proper divisors (585805998979).

11221012121021 is a wasteful number, since it uses less digits than its factorization.

11221012121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183276.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11221012121021 its reverse (12012121012211), we get a palindrome (23233133133232).

The spelling of 11221012121021 in words is "eleven trillion, two hundred twenty-one billion, twelve million, one hundred twenty-one thousand, twenty-one".