211112220021 has 8 divisors (see below), whose sum is σ = 281988317664. Its totient is φ = 140488801200.

The previous prime is 211112219993. The next prime is 211112220023. The reversal of 211112220021 is 120022211112.

211112220021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 211112220021 - 2¹⁰ = 211112218997 is a prime.

It is a super-2 number, since 2×211112220021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112220023) 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 7 ways as a sum of consecutive naturals, for example, 63167755 + ... + 63171096.

It is an arithmetic number, because the mean of its divisors is an integer number (35248539708).

Almost surely, 2^211112220021 is an apocalyptic number.

It is an amenable number.

211112220021 is a deficient number, since it is larger than the sum of its proper divisors (70876097643).

211112220021 is a wasteful number, since it uses less digits than its factorization.

211112220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126339411.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211112220021 its reverse (120022211112), we get a palindrome (331134431133).

The spelling of 211112220021 in words is "two hundred eleven billion, one hundred twelve million, two hundred twenty thousand, twenty-one".