11221012012221 has 12 divisors (see below), whose sum is σ = 17681594686080. Its totient is φ = 6800613340680.

The previous prime is 11221012012183. The next prime is 11221012012241. The reversal of 11221012012221 is 12221021012211.

11221012012221 is a `hidden beast` number, since 112 + 210 + 120 + 1 + 2 + 221 = 666.

It is not a de Polignac number, because 11221012012221 - 2⁹ = 11221012011709 is a prime.

It is a super-2 number, since 2×11221012012221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11221012012194 and 11221012012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221012012241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56671777741 + ... + 56671777938.

It is an arithmetic number, because the mean of its divisors is an integer number (1473466223840).

Almost surely, 2^{11221012012221} is an apocalyptic number.

11221012012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221012012221 is a deficient number, since it is larger than the sum of its proper divisors (6460582673859).

11221012012221 is a wasteful number, since it uses less digits than its factorization.

11221012012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113343555696 (or 113343555693 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11221012012221 its reverse (12221021012211), we get a palindrome (23442033024432).

The spelling of 11221012012221 in words is "eleven trillion, two hundred twenty-one billion, twelve million, twelve thousand, two hundred twenty-one".