212185838651 has 2 divisors, whose sum is σ = 212185838652. Its totient is φ = 212185838650.

The previous prime is 212185838639. The next prime is 212185838659. The reversal of 212185838651 is 156838581212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212185838651 - 2²² = 212181644347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212185838651.

It is not a weakly prime, because it can be changed into another prime (212185838659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106092919325 + 106092919326.

It is an arithmetic number, because the mean of its divisors is an integer number (106092919326).

Almost surely, 2^212185838651 is an apocalyptic number.

212185838651 is a deficient number, since it is larger than the sum of its proper divisors (1).

212185838651 is an equidigital number, since it uses as much as digits as its factorization.

212185838651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 921600, while the sum is 50.

The spelling of 212185838651 in words is "two hundred twelve billion, one hundred eighty-five million, eight hundred thirty-eight thousand, six hundred fifty-one".