2021221222012 has 6 divisors (see below), whose sum is σ = 3537137138528. Its totient is φ = 1010610611004.

The previous prime is 2021221221979. The next prime is 2021221222019. The reversal of 2021221222012 is 2102221221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021221222019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252652652748 + ... + 252652652755.

Almost surely, 2^{2021221222012} is an apocalyptic number.

It is an amenable number.

2021221222012 is a deficient number, since it is larger than the sum of its proper divisors (1515915916516).

2021221222012 is a wasteful number, since it uses less digits than its factorization.

2021221222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505305305507 (or 505305305505 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2021221222012 its reverse (2102221221202), we get a palindrome (4123442443214).

The spelling of 2021221222012 in words is "two trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, twelve".