11100021221012 has 6 divisors (see below), whose sum is σ = 19425037136778. Its totient is φ = 5550010610504.

The previous prime is 11100021221011. The next prime is 11100021221027. The reversal of 11100021221012 is 21012212000111.

It can be written as a sum of positive squares in only one way, i.e., 6726418609156 + 4373602611856 = 2593534^2 + 2091316^2 .

It is a super-2 number, since 2×11100021221012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100021221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387502652623 + ... + 1387502652630.

It is an arithmetic number, because the mean of its divisors is an integer number (3237506189463).

Almost surely, 2^{11100021221012} is an apocalyptic number.

It is an amenable number.

11100021221012 is a deficient number, since it is larger than the sum of its proper divisors (8325015915766).

11100021221012 is a wasteful number, since it uses less digits than its factorization.

11100021221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775005305257 (or 2775005305255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11100021221012 its reverse (21012212000111), we get a palindrome (32112233221123).

The spelling of 11100021221012 in words is "eleven trillion, one hundred billion, twenty-one million, two hundred twenty-one thousand, twelve".