1221019 has 2 divisors, whose sum is σ = 1221020. Its totient is φ = 1221018.

The previous prime is 1220993. The next prime is 1221029. The reversal of 1221019 is 9101221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221019 - 2⁹ = 1220507 is a prime.

It is a super-2 number, since 2×1221019² = 2981774796722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220993 and 1221011.

It is not a weakly prime, because it can be changed into another prime (1221029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610509 + 610510.

It is an arithmetic number, because the mean of its divisors is an integer number (610510).

2^1221019 is an apocalyptic number.

1221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221019 is an equidigital number, since it uses as much as digits as its factorization.

1221019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1221019 is about 1104.9972850645. The cubic root of 1221019 is about 106.8827142386.

The spelling of 1221019 in words is "one million, two hundred twenty-one thousand, nineteen".