10212004231021 has 4 divisors (see below), whose sum is σ = 10212264906844. Its totient is φ = 10211743555200.

The previous prime is 10212004230991. The next prime is 10212004231151. The reversal of 10212004231021 is 12013240021201.

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 6066423186121 + 4145581044900 = 2463011^2 + 2036070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212004231021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10212004231021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212004231921) 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, 130279140 + ... + 130357501.

It is an arithmetic number, because the mean of its divisors is an integer number (2553066226711).

Almost surely, 2^{10212004231021} is an apocalyptic number.

It is an amenable number.

10212004231021 is a deficient number, since it is larger than the sum of its proper divisors (260675823).

10212004231021 is an equidigital number, since it uses as much as digits as its factorization.

10212004231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260675822.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 10212004231021 its reverse (12013240021201), we get a palindrome (22225244252222).

The spelling of 10212004231021 in words is "ten trillion, two hundred twelve billion, four million, two hundred thirty-one thousand, twenty-one".