11012200121221 has 8 divisors (see below), whose sum is σ = 11859575786744. Its totient is φ = 10164864934080.

The previous prime is 11012200121203. The next prime is 11012200121231. The reversal of 11012200121221 is 12212100221011.

It can be written as a sum of positive squares in 4 ways, for example, as 1658328393121 + 9353871728100 = 1287761^2 + 3058410^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11012200121221 - 2³³ = 11003610186629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11012200121195 and 11012200121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012200121231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9553386 + ... + 10643851.

It is an arithmetic number, because the mean of its divisors is an integer number (1482446973343).

Almost surely, 2^{11012200121221} is an apocalyptic number.

It is an amenable number.

11012200121221 is a deficient number, since it is larger than the sum of its proper divisors (847375665523).

11012200121221 is a wasteful number, since it uses less digits than its factorization.

11012200121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20239191.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11012200121221 its reverse (12212100221011), we get a palindrome (23224300342232).

The spelling of 11012200121221 in words is "eleven trillion, twelve billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-one".