7090961221 has 4 divisors (see below), whose sum is σ = 7164064012. Its totient is φ = 7017858432.

The previous prime is 7090961209. The next prime is 7090961243. The reversal of 7090961221 is 1221690907.

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 4178200321 + 2912760900 = 64639^2 + 53970^2 .

It is not a de Polignac number, because 7090961221 - 2²⁵ = 7057406789 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 (7090961201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36551250 + ... + 36551443.

It is an arithmetic number, because the mean of its divisors is an integer number (1791016003).

Almost surely, 2^7090961221 is an apocalyptic number.

It is an amenable number.

7090961221 is a deficient number, since it is larger than the sum of its proper divisors (73102791).

7090961221 is an equidigital number, since it uses as much as digits as its factorization.

7090961221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73102790.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 7090961221 is about 84207.8453649065. The cubic root of 7090961221 is about 1921.1813856590.

The spelling of 7090961221 in words is "seven billion, ninety million, nine hundred sixty-one thousand, two hundred twenty-one".