191019202011 has 36 divisors (see below), whose sum is σ = 309002619744. Its totient is φ = 113584854240.

The previous prime is 191019201991. The next prime is 191019202021. The reversal of 191019202011 is 110202910191.

It is not a de Polignac number, because 191019202011 - 2⁷ = 191019201883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191019202021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1597075 + ... + 1712508.

It is an arithmetic number, because the mean of its divisors is an integer number (8583406104).

Almost surely, 2^191019202011 is an apocalyptic number.

191019202011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

191019202011 is a deficient number, since it is larger than the sum of its proper divisors (117983417733).

191019202011 is a wasteful number, since it uses less digits than its factorization.

191019202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309664 (or 3309650 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 191019202011 in words is "one hundred ninety-one billion, nineteen million, two hundred two thousand, eleven".