491201055122 has 54 divisors (see below), whose sum is σ = 798779804277. Its totient is φ = 226516198832.

The previous prime is 491201055119. The next prime is 491201055157. The reversal of 491201055122 is 221550102194.

It can be written as a sum of positive squares in 2 ways, for example, as 490909021201 + 292033921 = 700649^2 + 17089^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=495581.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 661104683 + ... + 661105425.

Almost surely, 2^491201055122 is an apocalyptic number.

491201055122 is a deficient number, since it is larger than the sum of its proper divisors (307578749155).

491201055122 is an frugal number, since it uses more digits than its factorization.

491201055122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

Multiplying 491201055122 by its sum of digits (32), we get a square (15718433763904 = 3964648²).

The spelling of 491201055122 in words is "four hundred ninety-one billion, two hundred one million, fifty-five thousand, one hundred twenty-two".