101897211197 has 4 divisors (see below), whose sum is σ = 104651189916. Its totient is φ = 99143232480.

The previous prime is 101897211187. The next prime is 101897211301. The reversal of 101897211197 is 791112798101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791112798101 = 67 ⋅11807653703.

It can be written as a sum of positive squares in 2 ways, for example, as 89409372196 + 12487839001 = 299014^2 + 111749^2 .

It is a cyclic number.

It is not a de Polignac number, because 101897211197 - 2⁴ = 101897211181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101897211127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376989304 + ... + 1376989377.

It is an arithmetic number, because the mean of its divisors is an integer number (26162797479).

Almost surely, 2^101897211197 is an apocalyptic number.

It is an amenable number.

101897211197 is a deficient number, since it is larger than the sum of its proper divisors (2753978719).

101897211197 is an equidigital number, since it uses as much as digits as its factorization.

101897211197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753978718.

The product of its (nonzero) digits is 63504, while the sum is 47.

The spelling of 101897211197 in words is "one hundred one billion, eight hundred ninety-seven million, two hundred eleven thousand, one hundred ninety-seven".