100331320221221 has 2 divisors, whose sum is σ = 100331320221222. Its totient is φ = 100331320221220.

The previous prime is 100331320221179. The next prime is 100331320221233. The reversal of 100331320221221 is 122122023133001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95025258648100 + 5306061573121 = 9748090^2 + 2303489^2 .

It is a cyclic number.

It is not a de Polignac number, because 100331320221221 - 2⁶ = 100331320221157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100331320221281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50165660110610 + 50165660110611.

It is an arithmetic number, because the mean of its divisors is an integer number (50165660110611).

Almost surely, 2^{100331320221221} is an apocalyptic number.

It is an amenable number.

100331320221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100331320221221 is an equidigital number, since it uses as much as digits as its factorization.

100331320221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 100331320221221 its reverse (122122023133001), we get a palindrome (222453343354222).

The spelling of 100331320221221 in words is "one hundred trillion, three hundred thirty-one billion, three hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".