10020012101021 has 4 divisors (see below), whose sum is σ = 10790782262652. Its totient is φ = 9249241939392.

The previous prime is 10020012101003. The next prime is 10020012101059. The reversal of 10020012101021 is 12010121002001.

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 6318255340996 + 3701756760025 = 2513614^2 + 1923995^2 .

It is not a de Polignac number, because 10020012101021 - 2⁶ = 10020012100957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10020012100993 and 10020012101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020012103021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385385080796 + ... + 385385080821.

It is an arithmetic number, because the mean of its divisors is an integer number (2697695565663).

Almost surely, 2^{10020012101021} is an apocalyptic number.

It is an amenable number.

10020012101021 is a deficient number, since it is larger than the sum of its proper divisors (770770161631).

10020012101021 is an equidigital number, since it uses as much as digits as its factorization.

10020012101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770770161630.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10020012101021 its reverse (12010121002001), we get a palindrome (22030133103022).

The spelling of 10020012101021 in words is "ten trillion, twenty billion, twelve million, one hundred one thousand, twenty-one".