1102171947821 has 8 divisors (see below), whose sum is σ = 1261182104640. Its totient is φ = 943551046368.

The previous prime is 1102171947803. The next prime is 1102171947823. The reversal of 1102171947821 is 1287491712011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1102171947821 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 (1102171947823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97307771 + ... + 97319096.

It is an arithmetic number, because the mean of its divisors is an integer number (157647763080).

Almost surely, 2^{1102171947821} is an apocalyptic number.

It is an amenable number.

1102171947821 is a deficient number, since it is larger than the sum of its proper divisors (159010156819).

1102171947821 is an equidigital number, since it uses as much as digits as its factorization.

1102171947821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194627683.

The product of its (nonzero) digits is 56448, while the sum is 44.

The spelling of 1102171947821 in words is "one trillion, one hundred two billion, one hundred seventy-one million, nine hundred forty-seven thousand, eight hundred twenty-one".