491011111202 has 4 divisors (see below), whose sum is σ = 736516666806. Its totient is φ = 245505555600.

The previous prime is 491011111187. The next prime is 491011111207. The reversal of 491011111202 is 202111110194.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 421435970761 + 69575140441 = 649181^2 + 263771^2 .

It is a super-2 number, since 2×491011111202² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491011111207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122752777799 + ... + 122752777802.

Almost surely, 2^491011111202 is an apocalyptic number.

491011111202 is a deficient number, since it is larger than the sum of its proper divisors (245505555604).

491011111202 is a wasteful number, since it uses less digits than its factorization.

491011111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245505555603.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 491011111202 its reverse (202111110194), we get a palindrome (693122221396).

The spelling of 491011111202 in words is "four hundred ninety-one billion, eleven million, one hundred eleven thousand, two hundred two".