222012212012021 has 4 divisors (see below), whose sum is σ = 222019366111692. Its totient is φ = 222005057912352.

The previous prime is 222012212011927. The next prime is 222012212012033. The reversal of 222012212012021 is 120210212210222.

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 184376612746225 + 37635599265796 = 13578535^2 + 6134786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222012212012021 is a prime.

It is a super-3 number, since 3×222012212012021³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222012212011984 and 222012212012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222012212017021) 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, 3577003286 + ... + 3577065351.

It is an arithmetic number, because the mean of its divisors is an integer number (55504841527923).

Almost surely, 2^{222012212012021} is an apocalyptic number.

It is an amenable number.

222012212012021 is a deficient number, since it is larger than the sum of its proper divisors (7154099671).

222012212012021 is an equidigital number, since it uses as much as digits as its factorization.

222012212012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7154099670.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222012212012021 its reverse (120210212210222), we get a palindrome (342222424222243).

The spelling of 222012212012021 in words is "two hundred twenty-two trillion, twelve billion, two hundred twelve million, twelve thousand, twenty-one".