1020091929191 has 4 divisors (see below), whose sum is σ = 1030191849384. Its totient is φ = 1009992009000.

The previous prime is 1020091929187. The next prime is 1020091929193. The reversal of 1020091929191 is 1919291900201.

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 1020091929191 - 2² = 1020091929187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020091929193) 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, 5049959945 + ... + 5049960146.

It is an arithmetic number, because the mean of its divisors is an integer number (257547962346).

Almost surely, 2^{1020091929191} is an apocalyptic number.

1020091929191 is a deficient number, since it is larger than the sum of its proper divisors (10099920193).

1020091929191 is a wasteful number, since it uses less digits than its factorization.

1020091929191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10099920192.

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 1020091929191 in words is "one trillion, twenty billion, ninety-one million, nine hundred twenty-nine thousand, one hundred ninety-one".