2043112662221 has 2 divisors, whose sum is σ = 2043112662222. Its totient is φ = 2043112662220.

The previous prime is 2043112662211. The next prime is 2043112662223. The reversal of 2043112662221 is 1222662113402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1930626880900 + 112485781321 = 1389470^2 + 335389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2043112662221 is a prime.

Together with 2043112662223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2043112662223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021556331110 + 1021556331111.

It is an arithmetic number, because the mean of its divisors is an integer number (1021556331111).

Almost surely, 2^{2043112662221} is an apocalyptic number.

It is an amenable number.

2043112662221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043112662221 is an equidigital number, since it uses as much as digits as its factorization.

2043112662221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 2043112662221 its reverse (1222662113402), we get a palindrome (3265774775623).

The spelling of 2043112662221 in words is "two trillion, forty-three billion, one hundred twelve million, six hundred sixty-two thousand, two hundred twenty-one".