100102011222221 has 4 divisors (see below), whose sum is σ = 100109120249244. Its totient is φ = 100094902195200.

The previous prime is 100102011222149. The next prime is 100102011222223. The reversal of 100102011222221 is 122222110201001.

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 66145867926121 + 33956143296100 = 8133011^2 + 5827190^2 .

It is a cyclic number.

It is not a de Polignac number, because 100102011222221 - 2²² = 100102007027917 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 100102011222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102011222223) 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, 3554492390 + ... + 3554520551.

It is an arithmetic number, because the mean of its divisors is an integer number (25027280062311).

Almost surely, 2^{100102011222221} is an apocalyptic number.

It is an amenable number.

100102011222221 is a deficient number, since it is larger than the sum of its proper divisors (7109027023).

100102011222221 is an equidigital number, since it uses as much as digits as its factorization.

100102011222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7109027022.

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

Adding to 100102011222221 its reverse (122222110201001), we get a palindrome (222324121423222).

The spelling of 100102011222221 in words is "one hundred trillion, one hundred two billion, eleven million, two hundred twenty-two thousand, two hundred twenty-one".