1021222201 has 4 divisors (see below), whose sum is σ = 1027337472. Its totient is φ = 1015106932.

The previous prime is 1021222187. The next prime is 1021222207. The reversal of 1021222201 is 1022221201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1022221201 = 6977 ⋅146513.

It is a cyclic number.

It is not a de Polignac number, because 1021222201 - 2²⁹ = 484351289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021222207) 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 3 ways as a sum of consecutive naturals, for example, 3057385 + ... + 3057718.

It is an arithmetic number, because the mean of its divisors is an integer number (256834368).

Almost surely, 2^1021222201 is an apocalyptic number.

It is an amenable number.

1021222201 is a deficient number, since it is larger than the sum of its proper divisors (6115271).

1021222201 is an equidigital number, since it uses as much as digits as its factorization.

1021222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115270.

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

The square root of 1021222201 is about 31956.5674157911. The cubic root of 1021222201 is about 1007.0246063622.

Adding to 1021222201 its reverse (1022221201), we get a palindrome (2043443402).

The spelling of 1021222201 in words is "one billion, twenty-one million, two hundred twenty-two thousand, two hundred one".