1022012221 has 4 divisors (see below), whose sum is σ = 1024201152. Its totient is φ = 1019823292.

The previous prime is 1022012213. The next prime is 1022012237. The reversal of 1022012221 is 1222102201.

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.

It is a cyclic number.

It is not a de Polignac number, because 1022012221 - 2³ = 1022012213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022012021) 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, 1093765 + ... + 1094698.

It is an arithmetic number, because the mean of its divisors is an integer number (256050288).

Almost surely, 2^1022012221 is an apocalyptic number.

It is an amenable number.

1022012221 is a deficient number, since it is larger than the sum of its proper divisors (2188931).

1022012221 is an equidigital number, since it uses as much as digits as its factorization.

1022012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188930.

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

The square root of 1022012221 is about 31968.9258655964. The cubic root of 1022012221 is about 1007.2842183302.

Adding to 1022012221 its reverse (1222102201), we get a palindrome (2244114422).

The spelling of 1022012221 in words is "one billion, twenty-two million, twelve thousand, two hundred twenty-one".