100221121012211 has 4 divisors (see below), whose sum is σ = 103677021736800. Its totient is φ = 96765220287624.

The previous prime is 100221121012169. The next prime is 100221121012213. The reversal of 100221121012211 is 112210121122001.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-100221121012211 is a prime.

It is a super-2 number, since 2×100221121012211² (a number of 29 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 100221121012211.

It is not an unprimeable number, because it can be changed into a prime (100221121012213) 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, 1727950362251 + ... + 1727950362308.

It is an arithmetic number, because the mean of its divisors is an integer number (25919255434200).

Almost surely, 2^{100221121012211} is an apocalyptic number.

100221121012211 is a deficient number, since it is larger than the sum of its proper divisors (3455900724589).

100221121012211 is an equidigital number, since it uses as much as digits as its factorization.

100221121012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455900724588.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100221121012211 its reverse (112210121122001), we get a palindrome (212431242134212).

The spelling of 100221121012211 in words is "one hundred trillion, two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, two hundred eleven".