10212100211021 has 4 divisors (see below), whose sum is σ = 10404781347132. Its totient is φ = 10019419074912.

The previous prime is 10212100211011. The next prime is 10212100211051. The reversal of 10212100211021 is 12011200121201.

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 3886930540900 + 6325169670121 = 1971530^2 + 2514989^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212100211021 - 2²⁶ = 10212033102157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212100210987 and 10212100211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212100211011) 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, 96340567976 + ... + 96340568081.

It is an arithmetic number, because the mean of its divisors is an integer number (2601195336783).

Almost surely, 2^{10212100211021} is an apocalyptic number.

It is an amenable number.

10212100211021 is a deficient number, since it is larger than the sum of its proper divisors (192681136111).

10212100211021 is an equidigital number, since it uses as much as digits as its factorization.

10212100211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192681136110.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10212100211021 its reverse (12011200121201), we get a palindrome (22223300332222).

The spelling of 10212100211021 in words is "ten trillion, two hundred twelve billion, one hundred million, two hundred eleven thousand, twenty-one".