2021222212201 has 4 divisors (see below), whose sum is σ = 2021232170052. Its totient is φ = 2021212254352.

The previous prime is 2021222212171. The next prime is 2021222212249. The reversal of 2021222212201 is 1022122221202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 859189955625 + 1162032256576 = 926925^2 + 1077976^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021222212201 - 2¹³ = 2021222204009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021222252201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4667986 + ... + 5082571.

It is an arithmetic number, because the mean of its divisors is an integer number (505308042513).

Almost surely, 2^{2021222212201} is an apocalyptic number.

It is an amenable number.

2021222212201 is a deficient number, since it is larger than the sum of its proper divisors (9957851).

2021222212201 is an equidigital number, since it uses as much as digits as its factorization.

2021222212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957850.

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

Adding to 2021222212201 its reverse (1022122221202), we get a palindrome (3043344433403).

Subtracting from 2021222212201 its reverse (1022122221202), we obtain a palindrome (999099990999).

The spelling of 2021222212201 in words is "two trillion, twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred one".