1271197918020 has 48 divisors (see below), whose sum is σ = 3746688603840. Its totient is φ = 321144736896.

The previous prime is 1271197918007. The next prime is 1271197918037. The reversal of 1271197918020 is 208197911721.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557541807 + ... + 557544086.

It is an arithmetic number, because the mean of its divisors is an integer number (78056012580).

Almost surely, 2^{1271197918020} is an apocalyptic number.

1271197918020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271197918020 is an abundant number, since it is smaller than the sum of its proper divisors (2475490685820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271197918020 is a wasteful number, since it uses less digits than its factorization.

1271197918020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115085924 (or 1115085922 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 48.

The spelling of 1271197918020 in words is "one trillion, two hundred seventy-one billion, one hundred ninety-seven million, nine hundred eighteen thousand, twenty".