1306124261621 has 8 divisors (see below), whose sum is σ = 1329776046144. Its totient is φ = 1282660937920.

The previous prime is 1306124261599. The next prime is 1306124261711. The reversal of 1306124261621 is 1261624216031.

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

It is a de Polignac number, because none of the positive numbers 2^k-1306124261621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306124260621) 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, 47101220 + ... + 47128941.

It is an arithmetic number, because the mean of its divisors is an integer number (166222005768).

Almost surely, 2^{1306124261621} is an apocalyptic number.

It is an amenable number.

1306124261621 is a deficient number, since it is larger than the sum of its proper divisors (23651784523).

1306124261621 is an equidigital number, since it uses as much as digits as its factorization.

1306124261621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94230411.

The product of its (nonzero) digits is 20736, while the sum is 35.

Adding to 1306124261621 its reverse (1261624216031), we get a palindrome (2567748477652).

The spelling of 1306124261621 in words is "one trillion, three hundred six billion, one hundred twenty-four million, two hundred sixty-one thousand, six hundred twenty-one".