11420245613621 has 4 divisors (see below), whose sum is σ = 12298726045452. Its totient is φ = 10541765181792.

The previous prime is 11420245613611. The next prime is 11420245613633. The reversal of 11420245613621 is 12631654202411.

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 1618775280721 + 9801470332900 = 1272311^2 + 3130730^2 .

It is not a de Polignac number, because 11420245613621 - 2¹⁴ = 11420245597237 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 (11420245613611) 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, 439240215896 + ... + 439240215921.

It is an arithmetic number, because the mean of its divisors is an integer number (3074681511363).

Almost surely, 2^{11420245613621} is an apocalyptic number.

It is an amenable number.

11420245613621 is a deficient number, since it is larger than the sum of its proper divisors (878480431831).

11420245613621 is an equidigital number, since it uses as much as digits as its factorization.

11420245613621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878480431830.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 11420245613621 in words is "eleven trillion, four hundred twenty billion, two hundred forty-five million, six hundred thirteen thousand, six hundred twenty-one".