100321221043 has 2 divisors, whose sum is σ = 100321221044. Its totient is φ = 100321221042.

The previous prime is 100321220999. The next prime is 100321221101. The reversal of 100321221043 is 340122123001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100321221043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100321221043.

It is not a weakly prime, because it can be changed into another prime (100321228043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50160610521 + 50160610522.

It is an arithmetic number, because the mean of its divisors is an integer number (50160610522).

Almost surely, 2^100321221043 is an apocalyptic number.

100321221043 is a deficient number, since it is larger than the sum of its proper divisors (1).

100321221043 is an equidigital number, since it uses as much as digits as its factorization.

100321221043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 100321221043 its reverse (340122123001), we get a palindrome (440443344044).

The spelling of 100321221043 in words is "one hundred billion, three hundred twenty-one million, two hundred twenty-one thousand, forty-three".