10145355545221 has 4 divisors (see below), whose sum is σ = 10925767510252. Its totient is φ = 9364943580192.

The previous prime is 10145355545197. The next prime is 10145355545267. The reversal of 10145355545221 is 12254555354101.

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 649781088100 + 9495574457121 = 806090^2 + 3081489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10145355545221 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 (10145350545221) 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, 390205982496 + ... + 390205982521.

It is an arithmetic number, because the mean of its divisors is an integer number (2731441877563).

Almost surely, 2^{10145355545221} is an apocalyptic number.

It is an amenable number.

10145355545221 is a deficient number, since it is larger than the sum of its proper divisors (780411965031).

10145355545221 is an equidigital number, since it uses as much as digits as its factorization.

10145355545221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780411965030.

The product of its (nonzero) digits is 600000, while the sum is 43.

The spelling of 10145355545221 in words is "ten trillion, one hundred forty-five billion, three hundred fifty-five million, five hundred forty-five thousand, two hundred twenty-one".