100033001221 has 4 divisors (see below), whose sum is σ = 100061206912. Its totient is φ = 100004795532.

The previous prime is 100033001209. The next prime is 100033001267. The reversal of 100033001221 is 122100330001.

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 100033001221 - 2²¹ = 100030904069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100033001021) 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, 14097525 + ... + 14104618.

It is an arithmetic number, because the mean of its divisors is an integer number (25015301728).

Almost surely, 2^100033001221 is an apocalyptic number.

It is an amenable number.

100033001221 is a deficient number, since it is larger than the sum of its proper divisors (28205691).

100033001221 is an equidigital number, since it uses as much as digits as its factorization.

100033001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28205690.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 100033001221 its reverse (122100330001), we get a palindrome (222133331222).

The spelling of 100033001221 in words is "one hundred billion, thirty-three million, one thousand, two hundred twenty-one".