245112205021 has 2 divisors, whose sum is σ = 245112205022. Its totient is φ = 245112205020.

The previous prime is 245112205001. The next prime is 245112205031. The reversal of 245112205021 is 120502211542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179427640921 + 65684564100 = 423589^2 + 256290^2 .

It is a cyclic number.

It is not a de Polignac number, because 245112205021 - 2¹⁹ = 245111680733 is a prime.

It is a super-2 number, since 2×245112205021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245112205001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122556102510 + 122556102511.

It is an arithmetic number, because the mean of its divisors is an integer number (122556102511).

Almost surely, 2^245112205021 is an apocalyptic number.

It is an amenable number.

245112205021 is a deficient number, since it is larger than the sum of its proper divisors (1).

245112205021 is an equidigital number, since it uses as much as digits as its factorization.

245112205021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 245112205021 its reverse (120502211542), we get a palindrome (365614416563).

The spelling of 245112205021 in words is "two hundred forty-five billion, one hundred twelve million, two hundred five thousand, twenty-one".