101219947278397 has 2 divisors, whose sum is σ = 101219947278398. Its totient is φ = 101219947278396.

The previous prime is 101219947278361. The next prime is 101219947278449. The reversal of 101219947278397 is 793872749912101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69306723904356 + 31913223374041 = 8325066^2 + 5649179^2 .

It is a cyclic number.

It is not a de Polignac number, because 101219947278397 - 2³⁵ = 101185587540029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101219947275397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50609973639198 + 50609973639199.

It is an arithmetic number, because the mean of its divisors is an integer number (50609973639199).

Almost surely, 2^{101219947278397} is an apocalyptic number.

It is an amenable number.

101219947278397 is a deficient number, since it is larger than the sum of its proper divisors (1).

101219947278397 is an equidigital number, since it uses as much as digits as its factorization.

101219947278397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96018048, while the sum is 70.

The spelling of 101219947278397 in words is "one hundred one trillion, two hundred nineteen billion, nine hundred forty-seven million, two hundred seventy-eight thousand, three hundred ninety-seven".