100240211221 has 4 divisors (see below), whose sum is σ = 106136694252. Its totient is φ = 94343728192.

The previous prime is 100240211171. The next prime is 100240211233. The reversal of 100240211221 is 122112042001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29159319121 + 71080892100 = 170761^2 + 266610^2 .

It is a cyclic number.

It is not a de Polignac number, because 100240211221 - 2³¹ = 98092727573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100240211195 and 100240211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100240211251) 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 3 ways as a sum of consecutive naturals, for example, 2948241490 + ... + 2948241523.

It is an arithmetic number, because the mean of its divisors is an integer number (26534173563).

Almost surely, 2^100240211221 is an apocalyptic number.

It is an amenable number.

100240211221 is a deficient number, since it is larger than the sum of its proper divisors (5896483031).

100240211221 is an equidigital number, since it uses as much as digits as its factorization.

100240211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5896483030.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 100240211221 its reverse (122112042001), we get a palindrome (222352253222).

The spelling of 100240211221 in words is "one hundred billion, two hundred forty million, two hundred eleven thousand, two hundred twenty-one".