2021111012212 has 6 divisors (see below), whose sum is σ = 3536944271378. Its totient is φ = 1010555506104.

The previous prime is 2021111012117. The next prime is 2021111012213. The reversal of 2021111012212 is 2122101111202.

It can be written as a sum of positive squares in only one way, i.e., 1420306198756 + 600804813456 = 1191766^2 + 775116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111012213) by changing a digit.

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, 252638876523 + ... + 252638876530.

Almost surely, 2^{2021111012212} is an apocalyptic number.

It is an amenable number.

2021111012212 is a deficient number, since it is larger than the sum of its proper divisors (1515833259166).

2021111012212 is a wasteful number, since it uses less digits than its factorization.

2021111012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505277753057 (or 505277753055 counting only the distinct ones).

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

Adding to 2021111012212 its reverse (2122101111202), we get a palindrome (4143212123414).

The spelling of 2021111012212 in words is "two trillion, twenty-one billion, one hundred eleven million, twelve thousand, two hundred twelve".