101021221193 has 2 divisors, whose sum is σ = 101021221194. Its totient is φ = 101021221192.

The previous prime is 101021221183. The next prime is 101021221219. The reversal of 101021221193 is 391122120101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90160871824 + 10860349369 = 300268^2 + 104213^2 .

It is an emirp because it is prime and its reverse (391122120101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101021221193 - 2¹⁰ = 101021220169 is a prime.

It is not a weakly prime, because it can be changed into another prime (101021221123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510610596 + 50510610597.

It is an arithmetic number, because the mean of its divisors is an integer number (50510610597).

Almost surely, 2^101021221193 is an apocalyptic number.

It is an amenable number.

101021221193 is a deficient number, since it is larger than the sum of its proper divisors (1).

101021221193 is an equidigital number, since it uses as much as digits as its factorization.

101021221193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 101021221193 its reverse (391122120101), we get a palindrome (492143341294).

The spelling of 101021221193 in words is "one hundred one billion, twenty-one million, two hundred twenty-one thousand, one hundred ninety-three".