12623221081 has 8 divisors (see below), whose sum is σ = 12932593128. Its totient is φ = 12313920000.

The previous prime is 12623221063. The next prime is 12623221097. The reversal of 12623221081 is 18012232621.

It can be written as a sum of positive squares in 4 ways, for example, as 185395456 + 12437825625 = 13616^2 + 111525^2 .

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 12623221081 - 2²¹ = 12621123929 is a prime.

It is a super-2 number, since 2×12623221081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12623221001) 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, 614781 + ... + 634981.

It is an arithmetic number, because the mean of its divisors is an integer number (1616574141).

Almost surely, 2^12623221081 is an apocalyptic number.

It is an amenable number.

12623221081 is a deficient number, since it is larger than the sum of its proper divisors (309372047).

12623221081 is a wasteful number, since it uses less digits than its factorization.

12623221081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35483.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 12623221081 in words is "twelve billion, six hundred twenty-three million, two hundred twenty-one thousand, eighty-one".