20212102132021 has 8 divisors (see below), whose sum is σ = 20706433000344. Its totient is φ = 19717835681280.

The previous prime is 20212102132009. The next prime is 20212102132091. The reversal of 20212102132021 is 12023120121202.

It can be written as a sum of positive squares in 4 ways, for example, as 53923806225 + 20158178325796 = 232215^2 + 4489786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20212102132021 - 2⁹ = 20212102131509 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 20212102132021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212102132091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15468886 + ... + 16724551.

It is an arithmetic number, because the mean of its divisors is an integer number (2588304125043).

Almost surely, 2^{20212102132021} is an apocalyptic number.

It is an amenable number.

20212102132021 is a deficient number, since it is larger than the sum of its proper divisors (494330868323).

20212102132021 is a wasteful number, since it uses less digits than its factorization.

20212102132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32208791.

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

Adding to 20212102132021 its reverse (12023120121202), we get a palindrome (32235222253223).

The spelling of 20212102132021 in words is "twenty trillion, two hundred twelve billion, one hundred two million, one hundred thirty-two thousand, twenty-one".