356121001 has 2 divisors, whose sum is σ = 356121002. Its totient is φ = 356121000.

The previous prime is 356120993. The next prime is 356121097. The reversal of 356121001 is 100121653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340439401 + 15681600 = 18451^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 356121001 - 2³ = 356120993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 356121001.

It is not a weakly prime, because it can be changed into another prime (356121401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178060500 + 178060501.

It is an arithmetic number, because the mean of its divisors is an integer number (178060501).

Almost surely, 2^356121001 is an apocalyptic number.

It is an amenable number.

356121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

356121001 is an equidigital number, since it uses as much as digits as its factorization.

356121001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 356121001 is about 18871.1685117801. The cubic root of 356121001 is about 708.8143943723.

Adding to 356121001 its reverse (100121653), we get a palindrome (456242654).

The spelling of 356121001 in words is "three hundred fifty-six million, one hundred twenty-one thousand, one".