2021311223212 has 6 divisors (see below), whose sum is σ = 3537294640628. Its totient is φ = 1010655611604.

The previous prime is 2021311223093. The next prime is 2021311223231. The reversal of 2021311223212 is 2123221131202.

It is a super-2 number, since 2×2021311223212² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252663902898 + ... + 252663902905.

Almost surely, 2^{2021311223212} is an apocalyptic number.

It is an amenable number.

2021311223212 is a deficient number, since it is larger than the sum of its proper divisors (1515983417416).

2021311223212 is a wasteful number, since it uses less digits than its factorization.

2021311223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505327805807 (or 505327805805 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2021311223212 its reverse (2123221131202), we get a palindrome (4144532354414).

The spelling of 2021311223212 in words is "two trillion, twenty-one billion, three hundred eleven million, two hundred twenty-three thousand, two hundred twelve".