1228169929071 has 4 divisors (see below), whose sum is σ = 1637559905432. Its totient is φ = 818779952712.

The previous prime is 1228169929069. The next prime is 1228169929081. The reversal of 1228169929071 is 1709299618221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1228169929071 - 2¹ = 1228169929069 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 (1228169929081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204694988176 + ... + 204694988181.

It is an arithmetic number, because the mean of its divisors is an integer number (409389976358).

Almost surely, 2^{1228169929071} is an apocalyptic number.

1228169929071 is a deficient number, since it is larger than the sum of its proper divisors (409389976361).

1228169929071 is an equidigital number, since it uses as much as digits as its factorization.

1228169929071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409389976360.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The spelling of 1228169929071 in words is "one trillion, two hundred twenty-eight billion, one hundred sixty-nine million, nine hundred twenty-nine thousand, seventy-one".