1022212021 has 2 divisors, whose sum is σ = 1022212022. Its totient is φ = 1022212020.

The previous prime is 1022212019. The next prime is 1022212033. The reversal of 1022212021 is 1202122201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923308996 + 98903025 = 30386^2 + 9945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022212021 - 2¹ = 1022212019 is a prime.

Together with 1022212019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1022211992 and 1022212010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022212001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511106010 + 511106011.

It is an arithmetic number, because the mean of its divisors is an integer number (511106011).

Almost surely, 2^1022212021 is an apocalyptic number.

It is an amenable number.

1022212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022212021 is an equidigital number, since it uses as much as digits as its factorization.

1022212021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1022212021 is about 31972.0506223795. The cubic root of 1022212021 is about 1007.3498542946.

Adding to 1022212021 its reverse (1202122201), we get a palindrome (2224334222).

The spelling of 1022212021 in words is "one billion, twenty-two million, two hundred twelve thousand, twenty-one".