11012121221021 has 16 divisors (see below), whose sum is σ = 11086889276736. Its totient is φ = 10937599810176.

The previous prime is 11012121220937. The next prime is 11012121221039. The reversal of 11012121221021 is 12012212121011.

It is a cyclic number.

It is not a de Polignac number, because 11012121221021 - 2³⁰ = 11011047479197 is a prime.

It is a super-2 number, since 2×11012121221021² (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 (11012121220021) 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, 586584191 + ... + 586602963.

It is an arithmetic number, because the mean of its divisors is an integer number (692930579796).

Almost surely, 2^{11012121221021} is an apocalyptic number.

It is an amenable number.

11012121221021 is a deficient number, since it is larger than the sum of its proper divisors (74768055715).

11012121221021 is a wasteful number, since it uses less digits than its factorization.

11012121221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25132.

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

Adding to 11012121221021 its reverse (12012212121011), we get a palindrome (23024333342032).

The spelling of 11012121221021 in words is "eleven trillion, twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty-one".