1010101919 has 4 divisors (see below), whose sum is σ = 1010641944. Its totient is φ = 1009561896.

The previous prime is 1010101901. The next prime is 1010101933. The reversal of 1010101919 is 9191010101.

It is a happy number.

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 1010101919 - 2¹⁶ = 1010036383 is a prime.

It is a super-2 number, since 2×1010101919² = 2040611773534965122, 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 = 1010101894 and 1010101903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010101999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267197 + ... + 270950.

It is an arithmetic number, because the mean of its divisors is an integer number (252660486).

Almost surely, 2^1010101919 is an apocalyptic number.

1010101919 is a deficient number, since it is larger than the sum of its proper divisors (540025).

1010101919 is an equidigital number, since it uses as much as digits as its factorization.

1010101919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540024.

The product of its (nonzero) digits is 81, while the sum is 23.

The square root of 1010101919 is about 31782.1006071027. The cubic root of 1010101919 is about 1003.3560307911.

The spelling of 1010101919 in words is "one billion, ten million, one hundred one thousand, nine hundred nineteen".