12621001722 has 64 divisors (see below), whose sum is σ = 30739772160. Its totient is φ = 3372235776.

The previous prime is 12621001711. The next prime is 12621001733. The reversal of 12621001722 is 22710012621.

It is an interprime number because it is at equal distance from previous prime (12621001711) and next prime (12621001733).

It is a junction number, because it is equal to n+sod(n) for n = 12621001692 and 12621001701.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55804 + ... + 168392.

It is an arithmetic number, because the mean of its divisors is an integer number (480308940).

Almost surely, 2^12621001722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12621001722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15369886080).

12621001722 is an abundant number, since it is smaller than the sum of its proper divisors (18118770438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12621001722 is a wasteful number, since it uses less digits than its factorization.

12621001722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112775.

The product of its (nonzero) digits is 672, while the sum is 24.

The spelling of 12621001722 in words is "twelve billion, six hundred twenty-one million, one thousand, seven hundred twenty-two".