2111211220243 has 2 divisors, whose sum is σ = 2111211220244. Its totient is φ = 2111211220242.

The previous prime is 2111211220201. The next prime is 2111211220297. The reversal of 2111211220243 is 3420221121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111211220243 - 2²⁵ = 2111177665811 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111211230243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055605610121 + 1055605610122.

It is an arithmetic number, because the mean of its divisors is an integer number (1055605610122).

Almost surely, 2^{2111211220243} is an apocalyptic number.

2111211220243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111211220243 is an equidigital number, since it uses as much as digits as its factorization.

2111211220243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 2111211220243 its reverse (3420221121112), we get a palindrome (5531432341355).

The spelling of 2111211220243 in words is "two trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty thousand, two hundred forty-three".