20211201331 has 2 divisors, whose sum is σ = 20211201332. Its totient is φ = 20211201330.

The previous prime is 20211201317. The next prime is 20211201343. The reversal of 20211201331 is 13310211202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211201331 - 2⁵ = 20211201299 is a prime.

It is a super-2 number, since 2×20211201331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20211201301) 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, 10105600665 + 10105600666.

It is an arithmetic number, because the mean of its divisors is an integer number (10105600666).

Almost surely, 2^20211201331 is an apocalyptic number.

20211201331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211201331 is an equidigital number, since it uses as much as digits as its factorization.

20211201331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20211201331 its reverse (13310211202), we get a palindrome (33521412533).

The spelling of 20211201331 in words is "twenty billion, two hundred eleven million, two hundred one thousand, three hundred thirty-one".