10212121020021 has 32 divisors (see below), whose sum is σ = 13685816721408. Its totient is φ = 6773351397120.

The previous prime is 10212121019983. The next prime is 10212121020067. The reversal of 10212121020021 is 12002012121201.

It is not a de Polignac number, because 10212121020021 - 2¹⁰ = 10212121018997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212121020071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2228258896 + ... + 2228263478.

It is an arithmetic number, because the mean of its divisors is an integer number (427681772544).

Almost surely, 2^{10212121020021} is an apocalyptic number.

It is an amenable number.

10212121020021 is a deficient number, since it is larger than the sum of its proper divisors (3473695701387).

10212121020021 is a wasteful number, since it uses less digits than its factorization.

10212121020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9161.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10212121020021 its reverse (12002012121201), we get a palindrome (22214133141222).

The spelling of 10212121020021 in words is "ten trillion, two hundred twelve billion, one hundred twenty-one million, twenty thousand, twenty-one".