12211016542 has 4 divisors (see below), whose sum is σ = 18316524816. Its totient is φ = 6105508270.

The previous prime is 12211016471. The next prime is 12211016563. The reversal of 12211016542 is 24561011221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3052754134 + ... + 3052754137.

It is an arithmetic number, because the mean of its divisors is an integer number (4579131204).

Almost surely, 2^12211016542 is an apocalyptic number.

12211016542 is a deficient number, since it is larger than the sum of its proper divisors (6105508274).

12211016542 is an equidigital number, since it uses as much as digits as its factorization.

12211016542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105508273.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 12211016542 its reverse (24561011221), we get a palindrome (36772027763).

The spelling of 12211016542 in words is "twelve billion, two hundred eleven million, sixteen thousand, five hundred forty-two".