211120200011621 has 2 divisors, whose sum is σ = 211120200011622. Its totient is φ = 211120200011620.

The previous prime is 211120200011603. The next prime is 211120200011629. The reversal of 211120200011621 is 126110002021112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132888120899521 + 78232079112100 = 11527711^2 + 8844890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211120200011621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211120200011593 and 211120200011602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211120200011629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560100005810 + 105560100005811.

It is an arithmetic number, because the mean of its divisors is an integer number (105560100005811).

Almost surely, 2^{211120200011621} is an apocalyptic number.

It is an amenable number.

211120200011621 is a deficient number, since it is larger than the sum of its proper divisors (1).

211120200011621 is an equidigital number, since it uses as much as digits as its factorization.

211120200011621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 211120200011621 its reverse (126110002021112), we get a palindrome (337230202032733).

The spelling of 211120200011621 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred million, eleven thousand, six hundred twenty-one".