100321221197 has 2 divisors, whose sum is σ = 100321221198. Its totient is φ = 100321221196.

The previous prime is 100321221157. The next prime is 100321221211. The reversal of 100321221197 is 791122123001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71891551876 + 28429669321 = 268126^2 + 168611^2 .

It is a cyclic number.

It is not a de Polignac number, because 100321221197 - 2²⁰ = 100320172621 is a prime.

It is a super-2 number, since 2×100321221197² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100321221157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50160610598 + 50160610599.

It is an arithmetic number, because the mean of its divisors is an integer number (50160610599).

Almost surely, 2^100321221197 is an apocalyptic number.

It is an amenable number.

100321221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

100321221197 is an equidigital number, since it uses as much as digits as its factorization.

100321221197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

Adding to 100321221197 its reverse (791122123001), we get a palindrome (891443344198).

The spelling of 100321221197 in words is "one hundred billion, three hundred twenty-one million, two hundred twenty-one thousand, one hundred ninety-seven".