1220899097271 has 16 divisors (see below), whose sum is σ = 1860782123264. Its totient is φ = 697519957824.

The previous prime is 1220899097261. The next prime is 1220899097273. The reversal of 1220899097271 is 1727909980221.

It is not a de Polignac number, because 1220899097271 - 2³⁴ = 1203719228087 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 (1220899097273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5584750 + ... + 5799243.

It is an arithmetic number, because the mean of its divisors is an integer number (116298882704).

Almost surely, 2^{1220899097271} is an apocalyptic number.

1220899097271 is a deficient number, since it is larger than the sum of its proper divisors (639883025993).

1220899097271 is a wasteful number, since it uses less digits than its factorization.

1220899097271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11389110.

The product of its (nonzero) digits is 2286144, while the sum is 57.

The spelling of 1220899097271 in words is "one trillion, two hundred twenty billion, eight hundred ninety-nine million, ninety-seven thousand, two hundred seventy-one".