291120428131 has 4 divisors (see below), whose sum is σ = 313514307232. Its totient is φ = 268726549032.

The previous prime is 291120428111. The next prime is 291120428171. The reversal of 291120428131 is 131824021192.

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 291120428131 - 2¹¹ = 291120426083 is a prime.

It is a super-2 number, since 2×291120428131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291120428111) 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, 11196939531 + ... + 11196939556.

It is an arithmetic number, because the mean of its divisors is an integer number (78378576808).

Almost surely, 2^291120428131 is an apocalyptic number.

291120428131 is a deficient number, since it is larger than the sum of its proper divisors (22393879101).

291120428131 is a wasteful number, since it uses less digits than its factorization.

291120428131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22393879100.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 291120428131 in words is "two hundred ninety-one billion, one hundred twenty million, four hundred twenty-eight thousand, one hundred thirty-one".