214106490821 has 4 divisors (see below), whose sum is σ = 214200854700. Its totient is φ = 214012126944.

The previous prime is 214106490817. The next prime is 214106490877. The reversal of 214106490821 is 128094601412.

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 40759168321 + 173347322500 = 201889^2 + 416350^2 .

It is a cyclic number.

It is not a de Polignac number, because 214106490821 - 2² = 214106490817 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 (214106490881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47178536 + ... + 47183073.

It is an arithmetic number, because the mean of its divisors is an integer number (53550213675).

Almost surely, 2^214106490821 is an apocalyptic number.

It is an amenable number.

214106490821 is a deficient number, since it is larger than the sum of its proper divisors (94363879).

214106490821 is an equidigital number, since it uses as much as digits as its factorization.

214106490821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94363878.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 214106490821 in words is "two hundred fourteen billion, one hundred six million, four hundred ninety thousand, eight hundred twenty-one".