20311166341221 has 16 divisors (see below), whose sum is σ = 32017602115200. Its totient is φ = 11206160739648.

The previous prime is 20311166341139. The next prime is 20311166341243. The reversal of 20311166341221 is 12214366111302.

It is not a de Polignac number, because 20311166341221 - 2⁹ = 20311166340709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311166341321) 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 15 ways as a sum of consecutive naturals, for example, 16675833826 + ... + 16675835043.

It is an arithmetic number, because the mean of its divisors is an integer number (2001100132200).

Almost surely, 2^{20311166341221} is an apocalyptic number.

20311166341221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20311166341221 is a deficient number, since it is larger than the sum of its proper divisors (11706435773979).

20311166341221 is a wasteful number, since it uses less digits than its factorization.

20311166341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33351668908.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 20311166341221 in words is "twenty trillion, three hundred eleven billion, one hundred sixty-six million, three hundred forty-one thousand, two hundred twenty-one".