1020091311 has 12 divisors (see below), whose sum is σ = 1478268792. Its totient is φ = 677843856.

The previous prime is 1020091253. The next prime is 1020091379. The reversal of 1020091311 is 1131900201.

It is not a de Polignac number, because 1020091311 - 2⁷ = 1020091183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020091381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181836 + ... + 187361.

It is an arithmetic number, because the mean of its divisors is an integer number (123189066).

Almost surely, 2^1020091311 is an apocalyptic number.

1020091311 is a deficient number, since it is larger than the sum of its proper divisors (458177481).

1020091311 is a wasteful number, since it uses less digits than its factorization.

1020091311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369510 (or 369507 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1020091311 is about 31938.8683425071. The cubic root of 1020091311 is about 1006.6527464829.

Adding to 1020091311 its reverse (1131900201), we get a palindrome (2151991512).

The spelling of 1020091311 in words is "one billion, twenty million, ninety-one thousand, three hundred eleven".