12191921202 has 16 divisors (see below), whose sum is σ = 24385743072. Its totient is φ = 4063656960.

The previous prime is 12191921069. The next prime is 12191921207. The reversal of 12191921202 is 20212919121.

It is a self number, because there is not a number n which added to its sum of digits gives 12191921202.

It is not an unprimeable number, because it can be changed into a prime (12191921207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12333 + ... + 156639.

It is an arithmetic number, because the mean of its divisors is an integer number (1524108942).

Almost surely, 2^12191921202 is an apocalyptic number.

12191921202 is an abundant number, since it is smaller than the sum of its proper divisors (12193821870).

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

12191921202 is a wasteful number, since it uses less digits than its factorization.

12191921202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158393.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 12191921202 in words is "twelve billion, one hundred ninety-one million, nine hundred twenty-one thousand, two hundred two".