2021111221012 has 48 divisors (see below), whose sum is σ = 3846009263040. Its totient is φ = 923767633152.

The previous prime is 2021111221007. The next prime is 2021111221013. The reversal of 2021111221012 is 2101221111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111221013) 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, 15620488 + ... + 15749344.

It is an arithmetic number, because the mean of its divisors is an integer number (80125192980).

Almost surely, 2^{2021111221012} is an apocalyptic number.

It is an amenable number.

2021111221012 is a deficient number, since it is larger than the sum of its proper divisors (1824898042028).

2021111221012 is a wasteful number, since it uses less digits than its factorization.

2021111221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131800 (or 131798 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2021111221012 its reverse (2101221111202), we get a palindrome (4122332332214).

The spelling of 2021111221012 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred twenty-one thousand, twelve".