100120011222221 has 4 divisors (see below), whose sum is σ = 100120036568832. Its totient is φ = 100119985875612.

The previous prime is 100120011222211. The next prime is 100120011222227. The reversal of 100120011222221 is 122222110021001.

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.

It is a cyclic number.

It is not a de Polignac number, because 100120011222221 - 2⁶ = 100120011222157 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 100120011222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100120011222227) 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, 5329901 + ... + 15121106.

It is an arithmetic number, because the mean of its divisors is an integer number (25030009142208).

Almost surely, 2^{100120011222221} is an apocalyptic number.

It is an amenable number.

100120011222221 is a deficient number, since it is larger than the sum of its proper divisors (25346611).

100120011222221 is an equidigital number, since it uses as much as digits as its factorization.

100120011222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25346610.

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

Adding to 100120011222221 its reverse (122222110021001), we get a palindrome (222342121243222).

The spelling of 100120011222221 in words is "one hundred trillion, one hundred twenty billion, eleven million, two hundred twenty-two thousand, two hundred twenty-one".