212144239987 has 2 divisors, whose sum is σ = 212144239988. Its totient is φ = 212144239986.

The previous prime is 212144239903. The next prime is 212144240051. The reversal of 212144239987 is 789932441212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212144239987 - 2³¹ = 209996756339 is a prime.

It is not a weakly prime, because it can be changed into another prime (212144234987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106072119993 + 106072119994.

It is an arithmetic number, because the mean of its divisors is an integer number (106072119994).

Almost surely, 2^212144239987 is an apocalyptic number.

212144239987 is a deficient number, since it is larger than the sum of its proper divisors (1).

212144239987 is an equidigital number, since it uses as much as digits as its factorization.

212144239987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The spelling of 212144239987 in words is "two hundred twelve billion, one hundred forty-four million, two hundred thirty-nine thousand, nine hundred eighty-seven".