2127414521621 has 4 divisors (see below), whose sum is σ = 2196040796544. Its totient is φ = 2058788246700.

The previous prime is 2127414521597. The next prime is 2127414521647. The reversal of 2127414521621 is 1261254147212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2127414521621 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 (2127414521321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34313137415 + ... + 34313137476.

It is an arithmetic number, because the mean of its divisors is an integer number (549010199136).

Almost surely, 2^{2127414521621} is an apocalyptic number.

It is an amenable number.

2127414521621 is a deficient number, since it is larger than the sum of its proper divisors (68626274923).

2127414521621 is an equidigital number, since it uses as much as digits as its factorization.

2127414521621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68626274922.

The product of its digits is 53760, while the sum is 38.

Adding to 2127414521621 its reverse (1261254147212), we get a palindrome (3388668668833).

The spelling of 2127414521621 in words is "two trillion, one hundred twenty-seven billion, four hundred fourteen million, five hundred twenty-one thousand, six hundred twenty-one".