1201000019 has 4 divisors (see below), whose sum is σ = 1228930296. Its totient is φ = 1173069744.

The previous prime is 1201000007. The next prime is 1201000027. The reversal of 1201000019 is 9100001021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9100001021 = 47 ⋅193617043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201000019 is a prime.

It is a super-2 number, since 2×1201000019² = 2884802091276000722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200999967 and 1201000012.

It is not an unprimeable number, because it can be changed into a prime (1201000219) 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 in 3 ways as a sum of consecutive naturals, for example, 13965074 + ... + 13965159.

It is an arithmetic number, because the mean of its divisors is an integer number (307232574).

Almost surely, 2^1201000019 is an apocalyptic number.

1201000019 is a deficient number, since it is larger than the sum of its proper divisors (27930277).

1201000019 is an equidigital number, since it uses as much as digits as its factorization.

1201000019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27930276.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1201000019 is about 34655.4471764541. The cubic root of 1201000019 is about 1062.9536757665.

The spelling of 1201000019 in words is "one billion, two hundred one million, nineteen", and thus it is an aban number.