100102011221 has 4 divisors (see below), whose sum is σ = 100542989472. Its totient is φ = 99661032972.

The previous prime is 100102011179. The next prime is 100102011253. The reversal of 100102011221 is 122110201001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122110201001 = 47 ⋅2598089383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100102011221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102011521) 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, 220488785 + ... + 220489238.

It is an arithmetic number, because the mean of its divisors is an integer number (25135747368).

Almost surely, 2^100102011221 is an apocalyptic number.

It is an amenable number.

100102011221 is a deficient number, since it is larger than the sum of its proper divisors (440978251).

100102011221 is an equidigital number, since it uses as much as digits as its factorization.

100102011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440978250.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100102011221 its reverse (122110201001), we get a palindrome (222212212222).

The spelling of 100102011221 in words is "one hundred billion, one hundred two million, eleven thousand, two hundred twenty-one".