2021212110021 has 16 divisors (see below), whose sum is σ = 2908312296960. Its totient is φ = 1241226118080.

The previous prime is 2021212109971. The next prime is 2021212110031. The reversal of 2021212110021 is 1200112121202.

It is not a de Polignac number, because 2021212110021 - 2⁶ = 2021212109957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021212110031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54079390 + ... + 54116751.

It is an arithmetic number, because the mean of its divisors is an integer number (181769518560).

Almost surely, 2^{2021212110021} is an apocalyptic number.

It is an amenable number.

2021212110021 is a deficient number, since it is larger than the sum of its proper divisors (887100186939).

2021212110021 is a wasteful number, since it uses less digits than its factorization.

2021212110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108196636.

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

Adding to 2021212110021 its reverse (1200112121202), we get a palindrome (3221324231223).

The spelling of 2021212110021 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred ten thousand, twenty-one".