11771212870 has 32 divisors (see below), whose sum is σ = 21429424800. Its totient is φ = 4654980096.

The previous prime is 11771212867. The next prime is 11771212907. The reversal of 11771212870 is 7821217711.

It is a super-2 number, since 2×11771212870² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 982476 + ... + 994384.

It is an arithmetic number, because the mean of its divisors is an integer number (669669525).

Almost surely, 2^11771212870 is an apocalyptic number.

11771212870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11771212870 is a deficient number, since it is larger than the sum of its proper divisors (9658211930).

11771212870 is a wasteful number, since it uses less digits than its factorization.

11771212870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13032.

The product of its (nonzero) digits is 10976, while the sum is 37.

The spelling of 11771212870 in words is "eleven billion, seven hundred seventy-one million, two hundred twelve thousand, eight hundred seventy".