20213211131 has 2 divisors, whose sum is σ = 20213211132. Its totient is φ = 20213211130.

The previous prime is 20213211121. The next prime is 20213211133. The reversal of 20213211131 is 13111231202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20213211131 - 2¹⁰ = 20213210107 is a prime.

It is a super-2 number, since 2×20213211131² (a number of 21 digits) contains 22 as substring.

Together with 20213211133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20213211133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106605565 + 10106605566.

It is an arithmetic number, because the mean of its divisors is an integer number (10106605566).

Almost surely, 2^20213211131 is an apocalyptic number.

20213211131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213211131 is an equidigital number, since it uses as much as digits as its factorization.

20213211131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20213211131 its reverse (13111231202), we get a palindrome (33324442333).

The spelling of 20213211131 in words is "twenty billion, two hundred thirteen million, two hundred eleven thousand, one hundred thirty-one".