212021131310021 has 8 divisors (see below), whose sum is σ = 239271496149600. Its totient is φ = 186100052560240.

The previous prime is 212021131310003. The next prime is 212021131310041. The reversal of 212021131310021 is 120013131120212.

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 212021131310021 - 2²⁶ = 212021064201157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021131309975 and 212021131310002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021131310041) 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, 332321522111 + ... + 332321522748.

It is an arithmetic number, because the mean of its divisors is an integer number (29908937018700).

Almost surely, 2^{212021131310021} is an apocalyptic number.

It is an amenable number.

212021131310021 is a deficient number, since it is larger than the sum of its proper divisors (27250364839579).

212021131310021 is a wasteful number, since it uses less digits than its factorization.

212021131310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664643044899.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 212021131310021 its reverse (120013131120212), we get a palindrome (332034262430233).

The spelling of 212021131310021 in words is "two hundred twelve trillion, twenty-one billion, one hundred thirty-one million, three hundred ten thousand, twenty-one".