10212122121021 has 20 divisors (see below), whose sum is σ = 15264296849472. Its totient is φ = 6803997292008.

The previous prime is 10212122121011. The next prime is 10212122121043. The reversal of 10212122121021 is 12012122121201.

10212122121021 is a `hidden beast` number, since 1 + 0 + 212 + 1 + 221 + 210 + 21 = 666.

It is not a de Polignac number, because 10212122121021 - 2⁶ = 10212122120957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10212122120985 and 10212122121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212122121001) 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 19 ways as a sum of consecutive naturals, for example, 37680085 + ... + 37950138.

Almost surely, 2^{10212122121021} is an apocalyptic number.

It is an amenable number.

10212122121021 is a deficient number, since it is larger than the sum of its proper divisors (5052174728451).

10212122121021 is an equidigital number, since it uses as much as digits as its factorization.

10212122121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75631902 (or 75631893 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10212122121021 its reverse (12012122121201), we get a palindrome (22224244242222).

The spelling of 10212122121021 in words is "ten trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, twenty-one".