20213213611 has 2 divisors, whose sum is σ = 20213213612. Its totient is φ = 20213213610.

The previous prime is 20213213609. The next prime is 20213213623. The reversal of 20213213611 is 11631231202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20213213611 - 2¹ = 20213213609 is a prime.

Together with 20213213609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20213213641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106606805 + 10106606806.

It is an arithmetic number, because the mean of its divisors is an integer number (10106606806).

Almost surely, 2^20213213611 is an apocalyptic number.

20213213611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213213611 is an equidigital number, since it uses as much as digits as its factorization.

20213213611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20213213611 its reverse (11631231202), we get a palindrome (31844444813).

The spelling of 20213213611 in words is "twenty billion, two hundred thirteen million, two hundred thirteen thousand, six hundred eleven".