10200387821 has 8 divisors (see below), whose sum is σ = 11631211704. Its totient is φ = 8861875200.

The previous prime is 10200387817. The next prime is 10200387851. The reversal of 10200387821 is 12878300201.

It can be written as a sum of positive squares in 4 ways, for example, as 2089404100 + 8110983721 = 45710^2 + 90061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10200387821 - 2² = 10200387817 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 (10200387851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23077580 + ... + 23078021.

It is an arithmetic number, because the mean of its divisors is an integer number (1453901463).

Almost surely, 2^10200387821 is an apocalyptic number.

It is an amenable number.

10200387821 is a deficient number, since it is larger than the sum of its proper divisors (1430823883).

10200387821 is a wasteful number, since it uses less digits than its factorization.

10200387821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46155631.

The product of its (nonzero) digits is 5376, while the sum is 32.

The spelling of 10200387821 in words is "ten billion, two hundred million, three hundred eighty-seven thousand, eight hundred twenty-one".