11897221796 has 6 divisors (see below), whose sum is σ = 20820138150. Its totient is φ = 5948610896.

The previous prime is 11897221771. The next prime is 11897221807. The reversal of 11897221796 is 69712279811.

It can be written as a sum of positive squares in only one way, i.e., 11672641600 + 224580196 = 108040^2 + 14986^2 .

It is a super-3 number, since 3×11897221796³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1487152721 + ... + 1487152728.

It is an arithmetic number, because the mean of its divisors is an integer number (3470023025).

Almost surely, 2^11897221796 is an apocalyptic number.

It is an amenable number.

11897221796 is a deficient number, since it is larger than the sum of its proper divisors (8922916354).

11897221796 is a wasteful number, since it uses less digits than its factorization.

11897221796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974305453 (or 2974305451 counting only the distinct ones).

The product of its digits is 762048, while the sum is 53.

The spelling of 11897221796 in words is "eleven billion, eight hundred ninety-seven million, two hundred twenty-one thousand, seven hundred ninety-six".