212201051509 has 2 divisors, whose sum is σ = 212201051510. Its totient is φ = 212201051508.

The previous prime is 212201051497. The next prime is 212201051539. The reversal of 212201051509 is 905150102212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206823029284 + 5378022225 = 454778^2 + 73335^2 .

It is a cyclic number.

It is not a de Polignac number, because 212201051509 - 2²³ = 212192662901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212201051539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100525754 + 106100525755.

It is an arithmetic number, because the mean of its divisors is an integer number (106100525755).

Almost surely, 2^212201051509 is an apocalyptic number.

It is an amenable number.

212201051509 is a deficient number, since it is larger than the sum of its proper divisors (1).

212201051509 is an equidigital number, since it uses as much as digits as its factorization.

212201051509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 212201051509 in words is "two hundred twelve billion, two hundred one million, fifty-one thousand, five hundred nine".