1621123647113 has 8 divisors (see below), whose sum is σ = 1696717887936. Its totient is φ = 1545955290000.

The previous prime is 1621123647097. The next prime is 1621123647133. The reversal of 1621123647113 is 3117463211261.

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 1621123647113 - 2⁴ = 1621123647097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621123647133) 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, 106463138 + ... + 106478363.

It is an arithmetic number, because the mean of its divisors is an integer number (212089735992).

Almost surely, 2^{1621123647113} is an apocalyptic number.

It is an amenable number.

1621123647113 is a deficient number, since it is larger than the sum of its proper divisors (75594240823).

1621123647113 is a wasteful number, since it uses less digits than its factorization.

1621123647113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212941855.

The product of its digits is 36288, while the sum is 38.

Adding to 1621123647113 its reverse (3117463211261), we get a palindrome (4738586858374).

The spelling of 1621123647113 in words is "one trillion, six hundred twenty-one billion, one hundred twenty-three million, six hundred forty-seven thousand, one hundred thirteen".