100100321221 has 16 divisors (see below), whose sum is σ = 109296235840. Its totient is φ = 91357580160.

The previous prime is 100100321161. The next prime is 100100321227. The reversal of 100100321221 is 122123001001.

It is a cyclic number.

It is not a de Polignac number, because 100100321221 - 2⁹ = 100100320709 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 (100100321227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 779550 + ... + 898831.

It is an arithmetic number, because the mean of its divisors is an integer number (6831014740).

Almost surely, 2^100100321221 is an apocalyptic number.

It is an amenable number.

100100321221 is a deficient number, since it is larger than the sum of its proper divisors (9195914619).

100100321221 is a wasteful number, since it uses less digits than its factorization.

100100321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678516.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 100100321221 its reverse (122123001001), we get a palindrome (222223322222).

The spelling of 100100321221 in words is "one hundred billion, one hundred million, three hundred twenty-one thousand, two hundred twenty-one".