11212220222021 has 32 divisors (see below), whose sum is σ = 14324386406400. Its totient is φ = 8537077736640.

The previous prime is 11212220222009. The next prime is 11212220222057. The reversal of 11212220222021 is 12022202221211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212220222021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11212220221984 and 11212220222002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212220222081) 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 in 31 ways as a sum of consecutive naturals, for example, 10597151 + ... + 11607068.

It is an arithmetic number, because the mean of its divisors is an integer number (447637075200).

Almost surely, 2^{11212220222021} is an apocalyptic number.

It is an amenable number.

11212220222021 is a deficient number, since it is larger than the sum of its proper divisors (3112166184379).

11212220222021 is a wasteful number, since it uses less digits than its factorization.

11212220222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22204449.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11212220222021 its reverse (12022202221211), we get a palindrome (23234422443232).

The spelling of 11212220222021 in words is "eleven trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty-two thousand, twenty-one".