2111421409 has 2 divisors, whose sum is σ = 2111421410. Its totient is φ = 2111421408.

The previous prime is 2111421401. The next prime is 2111421443. The reversal of 2111421409 is 9041241112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1242351009 + 869070400 = 35247^2 + 29480^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111421409 - 2³ = 2111421401 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111421401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055710704 + 1055710705.

It is an arithmetic number, because the mean of its divisors is an integer number (1055710705).

Almost surely, 2^2111421409 is an apocalyptic number.

It is an amenable number.

2111421409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111421409 is an equidigital number, since it uses as much as digits as its factorization.

2111421409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 2111421409 is about 45950.2057557961. The cubic root of 2111421409 is about 1282.8965590189.

The spelling of 2111421409 in words is "two billion, one hundred eleven million, four hundred twenty-one thousand, four hundred nine".