2021222011021 has 12 divisors (see below), whose sum is σ = 2197044104992. Its totient is φ = 1858086433728.

The previous prime is 2021222011009. The next prime is 2021222011043. The reversal of 2021222011021 is 1201102221202.

It is a happy number.

It is not a de Polignac number, because 2021222011021 - 2³⁷ = 1883783057549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021222010986 and 2021222011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021222012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81311385 + ... + 81336238.

Almost surely, 2^{2021222011021} is an apocalyptic number.

It is an amenable number.

2021222011021 is a deficient number, since it is larger than the sum of its proper divisors (175822093971).

2021222011021 is a wasteful number, since it uses less digits than its factorization.

2021222011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162647700 (or 162647683 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021222011021 its reverse (1201102221202), we get a palindrome (3222324232223).

The spelling of 2021222011021 in words is "two trillion, twenty-one billion, two hundred twenty-two million, eleven thousand, twenty-one".