100102220211221 has 4 divisors (see below), whose sum is σ = 100102577071500. Its totient is φ = 100101863350944.

The previous prime is 100102220211193. The next prime is 100102220211247. The reversal of 100102220211221 is 122112022201001.

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 53922380630596 + 46179839580625 = 7343186^2 + 6795575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100102220211221 is a prime.

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 100102220211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102220211271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178009046 + ... + 178570503.

It is an arithmetic number, because the mean of its divisors is an integer number (25025644267875).

Almost surely, 2^{100102220211221} is an apocalyptic number.

It is an amenable number.

100102220211221 is a deficient number, since it is larger than the sum of its proper divisors (356860279).

100102220211221 is an equidigital number, since it uses as much as digits as its factorization.

100102220211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356860278.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 100102220211221 its reverse (122112022201001), we get a palindrome (222214242412222).

The spelling of 100102220211221 in words is "one hundred trillion, one hundred two billion, two hundred twenty million, two hundred eleven thousand, two hundred twenty-one".