100211223221 has 4 divisors (see below), whose sum is σ = 100592254752. Its totient is φ = 99830191692.

The previous prime is 100211223163. The next prime is 100211223223. The reversal of 100211223221 is 122322112001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100211223221 is a prime.

It is a super-2 number, since 2×100211223221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100211223221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100211223223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190515371 + ... + 190515896.

It is an arithmetic number, because the mean of its divisors is an integer number (25148063688).

Almost surely, 2^100211223221 is an apocalyptic number.

It is an amenable number.

100211223221 is a deficient number, since it is larger than the sum of its proper divisors (381031531).

100211223221 is an equidigital number, since it uses as much as digits as its factorization.

100211223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381031530.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 100211223221 its reverse (122322112001), we get a palindrome (222533335222).

The spelling of 100211223221 in words is "one hundred billion, two hundred eleven million, two hundred twenty-three thousand, two hundred twenty-one".