21203064411211 has 2 divisors, whose sum is σ = 21203064411212. Its totient is φ = 21203064411210.

The previous prime is 21203064411209. The next prime is 21203064411233. The reversal of 21203064411211 is 11211446030212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21203064411211 - 2¹ = 21203064411209 is a prime.

Together with 21203064411209, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21203064411211.

It is not a weakly prime, because it can be changed into another prime (21203064111211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601532205605 + 10601532205606.

It is an arithmetic number, because the mean of its divisors is an integer number (10601532205606).

Almost surely, 2^{21203064411211} is an apocalyptic number.

21203064411211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203064411211 is an equidigital number, since it uses as much as digits as its factorization.

21203064411211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 21203064411211 in words is "twenty-one trillion, two hundred three billion, sixty-four million, four hundred eleven thousand, two hundred eleven".