10200001220021 has 8 divisors (see below), whose sum is σ = 10202980609560. Its totient is φ = 10197022090752.

The previous prime is 10200001220011. The next prime is 10200001220047. The reversal of 10200001220021 is 12002210000201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14877900625 + 10185123319396 = 121975^2 + 3191414^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10200001220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10200001219984 and 10200001220011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10200001220011) 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, 100073741 + ... + 100175613.

It is an arithmetic number, because the mean of its divisors is an integer number (1275372576195).

Almost surely, 2^{10200001220021} is an apocalyptic number.

It is an amenable number.

10200001220021 is a deficient number, since it is larger than the sum of its proper divisors (2979389539).

10200001220021 is a wasteful number, since it uses less digits than its factorization.

10200001220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130135.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10200001220021 its reverse (12002210000201), we get a palindrome (22202211220222).

The spelling of 10200001220021 in words is "ten trillion, two hundred billion, one million, two hundred twenty thousand, twenty-one".