12099293621 has 2 divisors, whose sum is σ = 12099293622. Its totient is φ = 12099293620.

The previous prime is 12099293599. The next prime is 12099293693. The reversal of 12099293621 is 12639299021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10909802500 + 1189491121 = 104450^2 + 34489^2 .

It is a cyclic number.

It is not a de Polignac number, because 12099293621 - 2¹⁴ = 12099277237 is a prime.

It is a super-2 number, since 2×12099293621² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12099293321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6049646810 + 6049646811.

It is an arithmetic number, because the mean of its divisors is an integer number (6049646811).

Almost surely, 2^12099293621 is an apocalyptic number.

It is an amenable number.

12099293621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12099293621 is an equidigital number, since it uses as much as digits as its factorization.

12099293621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 12099293621 in words is "twelve billion, ninety-nine million, two hundred ninety-three thousand, six hundred twenty-one".