1053551264021 has 4 divisors (see below), whose sum is σ = 1053566766444. Its totient is φ = 1053535761600.

The previous prime is 1053551263993. The next prime is 1053551264033. The reversal of 1053551264021 is 1204621553501.

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 195287983396 + 858263280625 = 441914^2 + 926425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1053551264021 - 2¹⁰ = 1053551262997 is a prime.

It is a super-2 number, since 2×1053551264021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053551264221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7648820 + ... + 7785341.

It is an arithmetic number, because the mean of its divisors is an integer number (263391691611).

Almost surely, 2^{1053551264021} is an apocalyptic number.

It is an amenable number.

1053551264021 is a deficient number, since it is larger than the sum of its proper divisors (15502423).

1053551264021 is an equidigital number, since it uses as much as digits as its factorization.

1053551264021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15502422.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 1053551264021 in words is "one trillion, fifty-three billion, five hundred fifty-one million, two hundred sixty-four thousand, twenty-one".