101320390921 has 2 divisors, whose sum is σ = 101320390922. Its totient is φ = 101320390920.

The previous prime is 101320390909. The next prime is 101320390933. The reversal of 101320390921 is 129093023101.

It is a balanced prime because it is at equal distance from previous prime (101320390909) and next prime (101320390933).

It can be written as a sum of positive squares in only one way, i.e., 74966440000 + 26353950921 = 273800^2 + 162339^2 .

It is a cyclic number.

It is not a de Polignac number, because 101320390921 - 2²³ = 101312002313 is a prime.

It is not a weakly prime, because it can be changed into another prime (101320390981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50660195460 + 50660195461.

It is an arithmetic number, because the mean of its divisors is an integer number (50660195461).

Almost surely, 2^101320390921 is an apocalyptic number.

It is an amenable number.

101320390921 is a deficient number, since it is larger than the sum of its proper divisors (1).

101320390921 is an equidigital number, since it uses as much as digits as its factorization.

101320390921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 101320390921 in words is "one hundred one billion, three hundred twenty million, three hundred ninety thousand, nine hundred twenty-one".