211221100010 has 8 divisors (see below), whose sum is σ = 380197980036. Its totient is φ = 84488440000.

The previous prime is 211221099989. The next prime is 211221100031. The reversal of 211221100010 is 10001122112.

211221100010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211221099989) and next prime (211221100031).

It can be written as a sum of positive squares in 2 ways, for example, as 191596172089 + 19624927921 = 437717^2 + 140089^2 .

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

It is a super-2 number, since 2×211221100010² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221099964 and 211221100000.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10561054991 + ... + 10561055010.

Almost surely, 2^211221100010 is an apocalyptic number.

211221100010 is a deficient number, since it is larger than the sum of its proper divisors (168976880026).

211221100010 is a wasteful number, since it uses less digits than its factorization.

211221100010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21122110008.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211221100010 its reverse (10001122112), we get a palindrome (221222222122).

The spelling of 211221100010 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred thousand, ten".