212147401 has 2 divisors, whose sum is σ = 212147402. Its totient is φ = 212147400.

The previous prime is 212147389. The next prime is 212147449. The reversal of 212147401 is 104741212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118831801 + 93315600 = 10901^2 + 9660^2 .

It is a cyclic number.

It is not a de Polignac number, because 212147401 - 2⁹ = 212146889 is a prime.

It is not a weakly prime, because it can be changed into another prime (212147461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106073700 + 106073701.

It is an arithmetic number, because the mean of its divisors is an integer number (106073701).

Almost surely, 2^212147401 is an apocalyptic number.

It is an amenable number.

212147401 is a deficient number, since it is larger than the sum of its proper divisors (1).

212147401 is an equidigital number, since it uses as much as digits as its factorization.

212147401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 212147401 is about 14565.2806701416. The cubic root of 212147401 is about 596.4113575720.

Adding to 212147401 its reverse (104741212), we get a palindrome (316888613).

The spelling of 212147401 in words is "two hundred twelve million, one hundred forty-seven thousand, four hundred one".