1012221019 has 4 divisors (see below), whose sum is σ = 1013040544. Its totient is φ = 1011401496.

The previous prime is 1012221013. The next prime is 1012221031. The reversal of 1012221019 is 9101222101.

It is a happy number.

1012221019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012221019 - 2¹⁵ = 1012188251 is a prime.

It is a super-2 number, since 2×1012221019² = 2049182782610796722, 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 = 1012220987 and 1012221005.

It is not an unprimeable number, because it can be changed into a prime (1012221013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407907 + ... + 410380.

It is an arithmetic number, because the mean of its divisors is an integer number (253260136).

Almost surely, 2^1012221019 is an apocalyptic number.

1012221019 is a deficient number, since it is larger than the sum of its proper divisors (819525).

1012221019 is an equidigital number, since it uses as much as digits as its factorization.

1012221019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819524.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1012221019 is about 31815.4210878938. The cubic root of 1012221019 is about 1004.0571899482.

The spelling of 1012221019 in words is "one billion, twelve million, two hundred twenty-one thousand, nineteen".