10555212140021 has 4 divisors (see below), whose sum is σ = 10558149859212. Its totient is φ = 10552274420832.

The previous prime is 10555212140009. The next prime is 10555212140023. The reversal of 10555212140021 is 12004121255501.

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 8068377759121 + 2486834380900 = 2840489^2 + 1576970^2 .

It is a cyclic number.

It is not a de Polignac number, because 10555212140021 - 2¹⁸ = 10555211877877 is a prime.

It is a super-2 number, since 2×10555212140021² (a number of 27 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 (10555212140023) 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, 1468854206 + ... + 1468861391.

It is an arithmetic number, because the mean of its divisors is an integer number (2639537464803).

Almost surely, 2^{10555212140021} is an apocalyptic number.

It is an amenable number.

10555212140021 is a deficient number, since it is larger than the sum of its proper divisors (2937719191).

10555212140021 is an equidigital number, since it uses as much as digits as its factorization.

10555212140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937719190.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 10555212140021 its reverse (12004121255501), we get a palindrome (22559333395522).

The spelling of 10555212140021 in words is "ten trillion, five hundred fifty-five billion, two hundred twelve million, one hundred forty thousand, twenty-one".