11212222203021 has 64 divisors (see below), whose sum is σ = 17500517720576. Its totient is φ = 6253098393600.

The previous prime is 11212222203001. The next prime is 11212222203023. The reversal of 11212222203021 is 12030222221211.

It is not a de Polignac number, because 11212222203021 - 2⁵ = 11212222202989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212222203023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 85450161 + ... + 85581273.

It is an arithmetic number, because the mean of its divisors is an integer number (273445589384).

Almost surely, 2^{11212222203021} is an apocalyptic number.

It is an amenable number.

11212222203021 is a deficient number, since it is larger than the sum of its proper divisors (6288295517555).

11212222203021 is a wasteful number, since it uses less digits than its factorization.

11212222203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131702.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 11212222203021 its reverse (12030222221211), we get a palindrome (23242444424232).

The spelling of 11212222203021 in words is "eleven trillion, two hundred twelve billion, two hundred twenty-two million, two hundred three thousand, twenty-one".