20111221209883 has 2 divisors, whose sum is σ = 20111221209884. Its totient is φ = 20111221209882.

The previous prime is 20111221209869. The next prime is 20111221209907. The reversal of 20111221209883 is 38890212211102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20111221209883 - 2¹³ = 20111221201691 is a prime.

It is a super-2 number, since 2×20111221209883² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20111221209853) 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 as a sum of consecutive naturals, namely, 10055610604941 + 10055610604942.

It is an arithmetic number, because the mean of its divisors is an integer number (10055610604942).

Almost surely, 2^{20111221209883} is an apocalyptic number.

20111221209883 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111221209883 is an equidigital number, since it uses as much as digits as its factorization.

20111221209883 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 40.

The spelling of 20111221209883 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-one million, two hundred nine thousand, eight hundred eighty-three".