214042208081621 has 4 divisors (see below), whose sum is σ = 214042291963500. Its totient is φ = 214042124199744.

The previous prime is 214042208081609. The next prime is 214042208081629. The reversal of 214042208081621 is 126180802240412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58306434298225 + 155735773783396 = 7635865^2 + 12479414^2 .

It is a cyclic number.

It is not a de Polignac number, because 214042208081621 - 2²⁶ = 214042140972757 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 (214042208081629) 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, 37989266 + ... + 43258163.

It is an arithmetic number, because the mean of its divisors is an integer number (53510572990875).

Almost surely, 2^{214042208081621} is an apocalyptic number.

It is an amenable number.

214042208081621 is a deficient number, since it is larger than the sum of its proper divisors (83881879).

214042208081621 is an equidigital number, since it uses as much as digits as its factorization.

214042208081621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83881878.

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 214042208081621 in words is "two hundred fourteen trillion, forty-two billion, two hundred eight million, eighty-one thousand, six hundred twenty-one".