291103050421 has 16 divisors (see below), whose sum is σ = 294291796480. Its totient is φ = 287932546800.

The previous prime is 291103050397. The next prime is 291103050431. The reversal of 291103050421 is 124050301192.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291103050421 is a prime.

It is a super-2 number, since 2×291103050421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 291103050421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291103050431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108497746 + ... + 108500428.

It is an arithmetic number, because the mean of its divisors is an integer number (18393237280).

Almost surely, 2^291103050421 is an apocalyptic number.

It is an amenable number.

291103050421 is a deficient number, since it is larger than the sum of its proper divisors (3188746059).

291103050421 is a wasteful number, since it uses less digits than its factorization.

291103050421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 291103050421 in words is "two hundred ninety-one billion, one hundred three million, fifty thousand, four hundred twenty-one".