2045040522221 has 2 divisors, whose sum is σ = 2045040522222. Its totient is φ = 2045040522220.

The previous prime is 2045040522103. The next prime is 2045040522229. The reversal of 2045040522221 is 1222250405402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2005945346596 + 39095175625 = 1416314^2 + 197725^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045040522221 - 2¹⁸ = 2045040260077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2045040522229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022520261110 + 1022520261111.

It is an arithmetic number, because the mean of its divisors is an integer number (1022520261111).

Almost surely, 2^{2045040522221} is an apocalyptic number.

It is an amenable number.

2045040522221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045040522221 is an equidigital number, since it uses as much as digits as its factorization.

2045040522221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 2045040522221 its reverse (1222250405402), we get a palindrome (3267290927623).

The spelling of 2045040522221 in words is "two trillion, forty-five billion, forty million, five hundred twenty-two thousand, two hundred twenty-one".