10521320313554 has 4 divisors (see below), whose sum is σ = 15781980470334. Its totient is φ = 5260660156776.

The previous prime is 10521320313529. The next prime is 10521320313577. The reversal of 10521320313554 is 45531302312501.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 10044633632929 + 476686680625 = 3169327^2 + 690425^2 .

It is a super-2 number, since 2×10521320313554² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2630330078387 + ... + 2630330078390.

Almost surely, 2^{10521320313554} is an apocalyptic number.

10521320313554 is a deficient number, since it is larger than the sum of its proper divisors (5260660156780).

10521320313554 is an equidigital number, since it uses as much as digits as its factorization.

10521320313554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260660156779.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 10521320313554 in words is "ten trillion, five hundred twenty-one billion, three hundred twenty million, three hundred thirteen thousand, five hundred fifty-four".