12649122194621 has 4 divisors (see below), whose sum is σ = 13799042394144. Its totient is φ = 11499201995100.

The previous prime is 12649122194617. The next prime is 12649122194663.

12649122194621 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12649122194621 - 2² = 12649122194617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12649122194621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649122191621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574960099745 + ... + 574960099766.

It is an arithmetic number, because the mean of its divisors is an integer number (3449760598536).

Almost surely, 2^{12649122194621} is an apocalyptic number.

12649122194621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12649122194621 is a deficient number, since it is larger than the sum of its proper divisors (1149920199523).

12649122194621 is a wasteful number, since it uses less digits than its factorization.

12649122194621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149920199522.

The product of its digits is 746496, while the sum is 50.

The spelling of 12649122194621 in words is "twelve trillion, six hundred forty-nine billion, one hundred twenty-two million, one hundred ninety-four thousand, six hundred twenty-one".