12211001988 has 24 divisors (see below), whose sum is σ = 28519528800. Its totient is φ = 4066449600.

The previous prime is 12211001983. The next prime is 12211001989. The reversal of 12211001988 is 88910011221.

12211001988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12211001983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472438 + ... + 497613.

It is an arithmetic number, because the mean of its divisors is an integer number (1188313700).

Almost surely, 2^12211001988 is an apocalyptic number.

It is an amenable number.

12211001988 is an abundant number, since it is smaller than the sum of its proper divisors (16308526812).

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

12211001988 is a wasteful number, since it uses less digits than its factorization.

12211001988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971107 (or 971105 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 33.

The spelling of 12211001988 in words is "twelve billion, two hundred eleven million, one thousand, nine hundred eighty-eight".