12209602421 has 8 divisors (see below), whose sum is σ = 12743388504. Its totient is φ = 11687054080.

The previous prime is 12209602403. The next prime is 12209602423. The reversal of 12209602421 is 12420690221.

It can be written as a sum of positive squares in 4 ways, for example, as 1761900625 + 10447701796 = 41975^2 + 102214^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12209602421 - 2¹⁸ = 12209340277 is a prime.

It is a super-2 number, since 2×12209602421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12209602423) 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, 2807216 + ... + 2811561.

It is an arithmetic number, because the mean of its divisors is an integer number (1592923563).

Almost surely, 2^12209602421 is an apocalyptic number.

It is an amenable number.

12209602421 is a deficient number, since it is larger than the sum of its proper divisors (533786083).

12209602421 is an equidigital number, since it uses as much as digits as its factorization.

12209602421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618871.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 12209602421 in words is "twelve billion, two hundred nine million, six hundred two thousand, four hundred twenty-one".