491220202212 has 72 divisors (see below), whose sum is σ = 1254709092000. Its totient is φ = 162024565248.

The previous prime is 491220202211. The next prime is 491220202237. The reversal of 491220202212 is 212202022194.

It is a super-2 number, since 2×491220202212² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491220202211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37494039 + ... + 37507137.

Almost surely, 2^491220202212 is an apocalyptic number.

It is an amenable number.

491220202212 is an abundant number, since it is smaller than the sum of its proper divisors (763488889788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491220202212 is a wasteful number, since it uses less digits than its factorization.

491220202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23945 (or 23940 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 491220202212 in words is "four hundred ninety-one billion, two hundred twenty million, two hundred two thousand, two hundred twelve".