212021131231 has 8 divisors (see below), whose sum is σ = 260949084704. Its totient is φ = 167752982880.

The previous prime is 212021131229. The next prime is 212021131243. The reversal of 212021131231 is 132131120212.

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

It is not a de Polignac number, because 212021131231 - 2¹ = 212021131229 is a prime.

It is a super-2 number, since 2×212021131231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212021131199 and 212021131208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021131291) 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, 1164951180 + ... + 1164951361.

It is an arithmetic number, because the mean of its divisors is an integer number (32618635588).

Almost surely, 2^212021131231 is an apocalyptic number.

212021131231 is a deficient number, since it is larger than the sum of its proper divisors (48927953473).

212021131231 is a wasteful number, since it uses less digits than its factorization.

212021131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329902561.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212021131231 its reverse (132131120212), we get a palindrome (344152251443).

The spelling of 212021131231 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-one thousand, two hundred thirty-one".