1222100019 has 12 divisors (see below), whose sum is σ = 2017435056. Its totient is φ = 698342832.

The previous prime is 1222100017. The next prime is 1222100039. The reversal of 1222100019 is 9100012221.

It is not a de Polignac number, because 1222100019 - 2¹ = 1222100017 is a prime.

It is a super-2 number, since 2×1222100019² = 2987056912879600722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222099974 and 1222100010.

It is not an unprimeable number, because it can be changed into a prime (1222100017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9699144 + ... + 9699269.

It is an arithmetic number, because the mean of its divisors is an integer number (168119588).

Almost surely, 2^1222100019 is an apocalyptic number.

1222100019 is a deficient number, since it is larger than the sum of its proper divisors (795335037).

1222100019 is a wasteful number, since it uses less digits than its factorization.

1222100019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19398426 (or 19398423 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1222100019 is about 34958.5471523060. The cubic root of 1222100019 is about 1069.1424750809.

The spelling of 1222100019 in words is "one billion, two hundred twenty-two million, one hundred thousand, nineteen".